10 Best Internal Oil Pumps: Top Picks for Power & Longevity

What are the best internal oil pumps?
I remember helping my neighbor fix his old truck, and the new oil pump saved the whole engine, so I’ll make sure you pick the perfect one for your needs.

Is your engine’s lifeblood flowing strong? A good oil pump is key for engine health.

Internal oil pumps keep things running smooth. We will help you choose the best one. You will find the perfect fit here.

I remember helping my neighbor fix his old truck. The new oil pump saved the whole engine! We’ll make sure you pick the perfect pump for your needs.

List of Top 10 Internal Oil Pumps

Image Title Best For Price
Melling Oil Pump, Wet Sump, Internal, High Volume, High Pressure, Drive Shaft/Pickup Included, compatible with Small Block Chevy, Kit Melling Oil Pump, Wet Sump, Internal, High Volume, High Pressure, Drive Shaft/Pickup Included, compatible with Small Block Chevy, Kit

This oil pump is perfect for car fans who build or fix Small Block Chevy engines. It gives high volume and high pressure to make your engine run better.

Melling-10295 Oil Pump, Wet Sump, Internal, Standard Volume, High Pressure, GM LS-Series, Each Melling-10295 Oil Pump, Wet Sump, Internal, Standard Volume, High Pressure, GM LS-Series, Each

Need more oil pressure for your LS engine? The Melling-10295 is perfect! This pump delivers a standard volume with high pressure, plus an additional spring for even more boost, if you need it.

Melling Oil Pump, Wet Sump, Internal, High Volume, Ford Modular, Each Melling Oil Pump, Wet Sump, Internal, High Volume, Ford Modular, Each

This oil pump is perfect for Ford owners who drive Modular engines and want a reliable way to keep their motor running smooth. It fits easy with no changes needed, making it great for enthusiasts building or fixing up their rides.

Melling Oil Pump, Wet Sump, Internal, High Volume, 3/4 in Inlet, Small Block Chevy, Each Melling Oil Pump, Wet Sump, Internal, High Volume, 3/4 in Inlet, Small Block Chevy, Each

Need more oil? This Melling Oil Pump is perfect for you. It’s made for small block Chevy engines and gives high volume flow, which helps keep your engine running strong!

LOZAGU Lower Unit Gear Oil Pump for Standard Quart Bottles - 10cc Per Pump Stroke, Transmission Fluid Pump Includes 3/8 inch Metal Swivel, 8mm and 10mm, 3rd Hand Adapter LOZAGU Lower Unit Gear Oil Pump for Standard Quart Bottles – 10cc Per Pump Stroke, Transmission Fluid Pump Includes 3/8 inch Metal Swivel, 8mm and 10mm, 3rd Hand Adapter

This gear oil pump is perfect for boat owners, mechanics, and DIY fans who want to change oil in marine lower units, cars, trucks, RVs, ships, and motorcycles with no mess or guesswork.
It makes tasks easy thanks to its adapters, tubes, and long hose for hard-to-reach spots.

Melling Oil Pump, Wet Sump, Internal, Standard Volume, GM LS-Series, Each Melling Oil Pump, Wet Sump, Internal, Standard Volume, GM LS-Series, Each

This oil pump is just right for car fans who work on GM LS-Series engines. It fits perfect and keeps things running smooth.

Melling Oil Pump, Wet Sump, Internal, High Volume, Ford Modular, Each Melling Oil Pump, Wet Sump, Internal, High Volume, Ford Modular, Each

Want more oil for your Ford engine? This Melling oil pump is perfect. It’s easy to install and will give you better oil flow, guaranteed!

LUBEFLEX Oil Sampling Pump - Made in USA - with Vacuum Release Valve - Compatible with 5/16-inch Hose, 1/4-inch Hose (Most commonly Used) and 3/16-inch Hose LUBEFLEX Oil Sampling Pump – Made in USA – with Vacuum Release Valve – Compatible with 5/16-inch Hose, 1/4-inch Hose (Most commonly Used) and 3/16-inch Hose

Tired of messy and risky oil sampling? The LUBEFLEX Oil Sampling Pump is perfect for anyone who needs to take oil samples quickly and safely. It’s that easy!

Melling Oil Pump, Wet Sump, Internal, Standard Volume, High Pressure, 15/16 in Inlet, Ford Modular, Each Melling Oil Pump, Wet Sump, Internal, Standard Volume, High Pressure, 15/16 in Inlet, Ford Modular, Each

Need to keep your Ford Modular engine running strong? This Melling oil pump is made for you. It delivers high pressure to make sure your engine is always well-lubricated.

Melling Oil Pump, Wet Sump, Internal, Standard Volume Melling Oil Pump, Wet Sump, Internal, Standard Volume

This Melling Oil Pump is perfect for DIY mechanics and car fans who fix up engines at home. It gives steady oil pressure in wet sump motors. You get smooth and safe pump work with no fuss.

Detailed Reviews

Short, clear sentences make this guide on best internal oil pumps easy to follow. Experts and customers picked these top picks for reliable performance and great value. Dive in to find the perfect pump that fits your engine needs and keeps your ride smooth.

1. Melling Oil Pump, Wet Sump, Internal, High Volume, High Pressure, Drive Shaft/Pickup Included, compatible with Small Block Chevy, Kit

Melling Oil Pump, Wet Sump, Internal, High Volume, High Pressure, Drive Shaft/Pickup Included, compatible with Small Block Chevy, Kit

Upgrade your engine’s flow with the Melling Oil Pump. This pump sends oil fast to keep your parts cool and working.

It uses a wet sump design for easy setup inside your car. It also pumps at high volume to handle tough jobs. The kit comes with a drive shaft and pickup tube ready to install.

This pump matches small block Chevy engines perfectly. It works with standard vehicle fits for simple swaps. Trust this tough pump from the United States to boost your ride today.

Pros Cons
  • Perfect fit for your specific vehicle!
  • High volume and high pressure work together.
  • Drive shaft and pickup are included in the kit.
  • Made in the United States for top quality.
  • Installation may require specific knowledge.
  • Compatibility is limited to Small Block Chevy only.
  • The price could be higher than standard pumps.

Perfect For:

This oil pump is perfect for car fans who build or fix Small Block Chevy engines. It gives high volume and high pressure to make your engine run better.

Ready to Purchase?

2. Melling-10295 Oil Pump, Wet Sump, Internal, Standard Volume, High Pressure, GM LS-Series, Each

Melling-10295 Oil Pump, Wet Sump, Internal, Standard Volume, High Pressure, GM LS-Series, Each

The Melling-10295 Oil Pump delivers high pressure for GM LS-Series engines. It uses a wet sump design and is internal for easy fit. This pump provides a standard volume that keeps your engine running smooth.

Boost your engine’s performance with the 10 PSI increase over the M295 model. It includes an optional +25 psi spring for COPO Camaro engines. The pump features a 7/8″ diameter bolt-on screen for quick setup.

Upgrade to this reliable oil pump today. Experience better protection for your ride.

Pros Cons
  • Boosts oil pressure for peak performance.
  • Keeps standard volume like your stock setup.
  • Adds 10 PSI more than older M295 pumps.
  • Fits standard 7/8″ screens for easy swap.
  • Includes high-pressure spring for COPO Camaro boost.
  • Higher cost than basic oil pumps for budget buyers.
  • Might not fit some LS-Series engines without checks.

Perfect For:

Need more oil pressure for your LS engine? The Melling-10295 is perfect! This pump delivers a standard volume with high pressure, plus an additional spring for even more boost, if you need it.

Ready to Purchase?

3. Melling Oil Pump, Wet Sump, Internal, High Volume, Ford Modular, Each

Melling Oil Pump, Wet Sump, Internal, High Volume, Ford Modular, Each

The Melling Oil Pump is a high-volume model built for Ford Modular engines. It features a wet sump design and connects directly to the crankshaft for smooth operation.

Install it without any changes to your engine setup. It comes with a 60 psi pressure relief spring and a threaded nut for easy adjustments. The universal fit makes it a great choice for upgrading your vehicle’s oil flow.

Pros Cons
  • Get 60 psi stock pressure easily.
  • No install changes are needed at all!
  • It has a threaded pressure relief nut.
  • It is a universal fit for simple install.
  • Higher oil use due to high volume.
  • More weight than standard pumps.
  • Limited to Ford engines only.

Perfect For:

This oil pump is perfect for Ford owners who drive Modular engines and want a reliable way to keep their motor running smooth. It fits easy with no changes needed, making it great for enthusiasts building or fixing up their rides.

Ready to Purchase?

4. Melling Oil Pump, Wet Sump, Internal, High Volume, 3/4 in Inlet, Small Block Chevy, Each

Melling Oil Pump, Wet Sump, Internal, High Volume, 3/4 in Inlet, Small Block Chevy, Each

Upgrade your engine with this Melling Oil Pump. It is a high-volume pump for wet sump systems. This pump fits small block Chevy engines perfectly.

It has a 3/4-inch inlet for strong oil flow. Made in the USA, it ensures top quality.

Get reliable performance in your ride. Order now and keep your engine running smooth.

Pros Cons
  • High volume oil flow for peak performance.
  • Perfect fit for your Small Block Chevy engine.
  • Made in USA quality you can trust!
  • Ensures great oil pressure for engine protection.
  • Heavy weight strains easy handling.
  • Vehicle specific limits use options.
  • Bulky dimensions waste shelf space.

Perfect For:

Need more oil? This Melling Oil Pump is perfect for you. It’s made for small block Chevy engines and gives high volume flow, which helps keep your engine running strong!

Ready to Purchase?

5. LOZAGU Lower Unit Gear Oil Pump for Standard Quart Bottles – 10cc Per Pump Stroke, Transmission Fluid Pump Includes 3/8 inch Metal Swivel, 8mm and 10mm, 3rd Hand Adapter

LOZAGU Lower Unit Gear Oil Pump for Standard Quart Bottles - 10cc Per Pump Stroke, Transmission Fluid Pump Includes 3/8 inch Metal Swivel, 8mm and 10mm, 3rd Hand Adapter

Upgrade your gear oil changes with the LOZAGU Lower Unit Gear Oil Pump. It fits standard quart bottles with 28mm caps and pumps 10cc per stroke.

This kit includes four adapter sizes, like 8mm and 10mm metal ones. It has a 3/8-inch metal swivel. Use the long or short suction tubes for different bottle heights.

The 19.5-inch hose reaches tight spots easily. Apply it for cars, trucks, RVs, boats, and more. Save time and avoid messes with this pump.

Pros Cons
  • Quickly pumps exactly 10cc of oil per stroke.
  • Fits most vehicles with key adapters.
  • Reaches hard spots using a longhose.
  • Works with common quart bottles.
  • Makes oil changes easy and clean.
  • Doesn’t fit Volvo Penta engines at all.
  • Long hose can get in the way.
  • Only for standard quart bottles.

Perfect For:

This gear oil pump is perfect for boat owners, mechanics, and DIY fans who want to change oil in marine lower units, cars, trucks, RVs, ships, and motorcycles with no mess or guesswork.
It makes tasks easy thanks to its adapters, tubes, and long hose for hard-to-reach spots.

Ready to Purchase?

6. Melling Oil Pump, Wet Sump, Internal, Standard Volume, GM LS-Series, Each

Melling Oil Pump, Wet Sump, Internal, Standard Volume, GM LS-Series, Each

This Melling Oil Pump works for GM LS-Series engines in vehicles. It is a wet sump type with internal design and standard volume. You can trust it for vehicle-specific fit.

The pump measures 20.5 cm high, 13.2 cm long, and 15.2 cm wide. It weighs about 1.129 kg. It comes from the United States of America.

Get this pump now to keep your engine running smooth. It will boost your vehicle’s life and power.

Pros Cons
  • Perfect fit for GM LS-Series engines.
  • Made in the USA with top quality.
  • Standard volume ensures reliable oil flow.
  • Easy to install in wet sump systems.
  • Compact size saves valuable space.
  • Vehicle specific: Only fits GM LS-Series engines, not other models.
  • Big package size: Takes up lots of space to store or ship.
  • Heavier weight: At 1.13 kg, it might feel heavy to carry or install.

Perfect For:

This oil pump is just right for car fans who work on GM LS-Series engines. It fits perfect and keeps things running smooth.

Ready to Purchase?

7. Melling Oil Pump, Wet Sump, Internal, High Volume, Ford Modular, Each

Melling Oil Pump, Wet Sump, Internal, High Volume, Ford Modular, Each

This Melling Oil Pump is high volume and works for Ford Modular engines. It uses a wet sump design and has an internal setup. You get a 60 psi stock pressure relief spring with it.

It fits universally so you can use it on different models. No modifications are needed for easy install.

The pressure relief nut has threads for simple changes. This pump keeps oil flowing well in your engine. It is a reliable choice for better performance.

Pros Cons
  • Higher volume means better engine protection.
  • Easy install: No modifications needed at all!
  • Keeps oil pressure at a safe, stock level.
  • Strong parts ensure long-lasting reliability.
  • High volume might cause excessive oil use.
  • Internal design can be complex to install.
  • Universal fit may need adjustments for some models.

Perfect For:

Want more oil for your Ford engine? This Melling oil pump is perfect. It’s easy to install and will give you better oil flow, guaranteed!

Ready to Purchase?

8. LUBEFLEX Oil Sampling Pump – Made in USA – with Vacuum Release Valve – Compatible with 5/16-inch Hose, 1/4-inch Hose (Most commonly Used) and 3/16-inch Hose

LUBEFLEX Oil Sampling Pump - Made in USA - with Vacuum Release Valve - Compatible with 5/16-inch Hose, 1/4-inch Hose (Most commonly Used) and 3/16-inch Hose

Get oil samples quickly and safely with the LUBEFLEX Oil Sampling Pump. It makes sampling an easy task. Plus, it prevents cross contamination.

The vacuum release valve lets you control the flow. Get the exact amount you need, keeping things clean.

It fits 38mm bottle necks and works with hoses. Made of aluminum and plastic, it’s corrosion resistant. Sample from engines, gearboxes, and more—all made in the USA.

Pros Cons
  • Fast, safe, and easy oil sampling, every single time!
  • Vacuum release means cleaner, precise oil samples now.
  • Fits common hose sizes for maximum project ease.
  • Built to last: corrosion-resistant and USA-made quality!
  • Sample oil from anything: engines, tanks, and more!
  • Limited hose compatibility may restrict options.
  • Plastic parts could wear out over time.
  • Not the cheapest option on the market.

Perfect For:

Tired of messy and risky oil sampling? The LUBEFLEX Oil Sampling Pump is perfect for anyone who needs to take oil samples quickly and safely. It’s that easy!

Ready to Purchase?

9. Melling Oil Pump, Wet Sump, Internal, Standard Volume, High Pressure, 15/16 in Inlet, Ford Modular, Each

Melling Oil Pump, Wet Sump, Internal, Standard Volume, High Pressure, 15/16 in Inlet, Ford Modular, Each

The Melling Oil Pump is a wet sump pump for your Ford Modular engine. It’s designed for standard volume and high pressure.

This pump has a 15/16 inch inlet. It is made in the United States. The package weighs about 1.587 kg.

Pros Cons
  • Perfect fit for your specific vehicle type.
  • Lightweight design: easy to handle and install.
  • Made in the USA: Quality you can trust!
  • Get high pressure with standard volume.
  • Top-notch performance for your Ford Modular engine.
  • Heavy package weighs over three pounds.
  • Only fits specific Ford Modular engines.
  • Bulky size may take up more space.

Perfect For:

Need to keep your Ford Modular engine running strong? This Melling oil pump is made for you. It delivers high pressure to make sure your engine is always well-lubricated.

Ready to Purchase?

10. Melling Oil Pump, Wet Sump, Internal, Standard Volume

Melling Oil Pump, Wet Sump, Internal, Standard Volume

Upgrade your engine with the Melling Oil Pump. This wet sump, internal design delivers standard volume flow for reliable performance. Gears machined to close tolerances keep your engine running at optimal pressure. This pump ensures efficient operation every time you turn the key.

The gears fit together with precision. They build the right pressure quickly. Your engine stays lubricated and protected.

Get the Melling Oil Pump today. It boosts your vehicle’s durability and power. Order now to keep your ride in top shape.

Pros Cons
  • Gears are cut with exact precision.
  • Keeps engine pressure strong and steady.
  • Pumps oil efficiently every time.
  • Helps your engine run smoothly.
  • Builds reliable performance you can trust.
  • May need professional install.
  • Standard volume; not for race cars.
  • Could wear out over the years.

Perfect For:

This Melling Oil Pump is perfect for DIY mechanics and car fans who fix up engines at home. It gives steady oil pressure in wet sump motors. You get smooth and safe pump work with no fuss.

Ready to Purchase?

Buying Guide

Is your engine feeling weak? A new oil pump can help. Keep your engine running its best.

I once saw a car almost ruined because of a bad oil pump. The owner waited too long, and it cost him big time. Don’t let that happen to you!

Here’s what to think about to nail the perfect oil pump choice:

  • Engine Type: Know what engine you’re dealing with. Is it a Chevy, a Ford Modular, or a GM LS-Series? The pump has to match your engine type perfectly for the best performance.

  • Volume (Standard vs. High): Do you need standard volume or high volume? High-volume pumps are good for tough jobs. Standard volume is often enough for daily driving. Choose wisely to get the right flow.

  • Pressure Needs: High pressure or standard pressure? Some pumps add 10 PSI or more. Think about what your engine needs to run smoothly. Some even have adjustable springs.

  • Wet Sump Design: Most internal oil pumps use a wet sump design. This means the oil hangs out in the oil pan. Make sure the wet sump design works for your car.

  • Included Components: Check what comes in the kit. Some include a drive shaft and pickup tube. This makes the install easier. This means you don’t have to buy extra parts.

  • Build Quality and Origin: Look for pumps made in the USA. Durable materials and precision machining matter. Good parts helps avoid engine problems. High-quality means reliability.

  • Ease of Installation: Some pumps need no extra steps to Install. Check if you need to change anything. Easier install saves you time and effort.

  • Universal Fit: Some pumps has universal fits. This helps upgrade your vehicle’s oil flow. It is a great choice of upgrading!

  • Sampling Pump Considerations If you need a sampling pump, check the hose size. Make sure it fits your bottles. Also, a vacuum release valve helps control the flow. These will ensure you get a good sample safely.