High Mileage Motor Oil

[g2020]

The industry consensus on high mileage is 75,000 miles. This is a collection of links on this topic, including an article published by Valvoline and a number of high-mileage motor oil options for the 3.6L gasoline engine.

Articles and Threads on High Mileage Motor Oil

When to Start Using High Mileage Oil: a Practical Guide
Valvoline by aramco

When to use High Mileage Oil?
BOB Is The Oil Guy (BITOG)

• See post #s 11, 12, 15, 17, & 19 (a sub-thread) for discussion of "seal sweller"; these five posts are a potato-potaato discussion, but post #12 notably mentions that the (GM) dexos 1 standard includes rigorous seal testing
• Only one of the high-mileage options in the next section is listed as complying with GM dexos 1 Gen 3 (irrelevant to Jeep manufacturer specifications, but relevant to seal conditioning); a higher concentration of seal conditioning additives may cause other high-mileage motor oil products not to meet dexos 1 Gen 3
• AMSOIL states that its High Mileage motor oil product line not only complies with API SQ, MS-6395, and GM dexos 1 Gen 3, but also is API Licensed

Selected API Licensed and MS-6395 Compliant Brands of High-Mileage SAE 0W-20 and SAE 5W-30 Motor Oil
- SAE 0W-20: Each of the following 0W-20 options meets or exceeds manufacturer specifications for the 3.6L gasoline engine
- SAE 5W-30: This viscosity grade is not recommended, but it is listed in the (revised) online version of the 2020 Gladiator owner's manual (see page 251, shown in OEM limits)

AMSOIL High Mileage 100% Synthetic Motor Oil SAE 0W-20 or SAE 5W-30
These are the high-mileage counterparts to the AMSOIL OE options listed in my post on Links to Prices; although the front label does not display the API starburst mark, "API Licensed" is stated on the AMSOIL website; also see PDS
- When used within OEM limits, this 0W-20 is one of two high-mileage motor oil products on this list that has no caveats/gotchas

Mobil 1 Extended Performance High Mileage Advanced Full Synthetic Motor Oil SAE 0W-20 or SAE 5W-30
The 0W-20 is the high-mileage counterpart to writer's pick in my post on Links to Prices
- When used within OEM limits, this 0W-20 is one of two high-mileage motor oil products on this list that has no caveats/gotchas

Pennzoil Platinum High Mileage Full Synthetic Motor Oil SAE 0W-20 or SAE 5W-30
The 0W-20 is the high-mileage counterpart to dealer's choice in my post on Links to Prices; the warranty does not cover Severe Duty

There is no high-mileage counterpart to Pennzoil Ultra Platinum Full Synthetic Motor Oil SAE 0W-20 or SAE 5W-30; the exclusive usage warranty on this motor oil is "for the lifetime of your vehicle" (conditions apply, of course); the warranty does not cover Severe Duty

There is no high-mileage counterpart to RED LINE SYNTHETIC OIL Professional-Series Full Synthetic Motor Oil SAE 0W-20 or SAE 5W-30; "For high and low-mileage engines" (see Product Details); "...factory drain intervals"; meets manufacturer specifications; also see PDS; the warranty is implied-only (product-replacement or money-back)
Note: RED LINE has an excellent reputation among racing & high-performance vehicle enthusiasts


As of March 2026, MS-6395 is not listed on the label of either of the following Valvoline high-mileage motor oil products. The link to each product has been removed and the product name has been crossed out:

Valvoline Extended Protection High Mileage Premium Full Synthetic Motor Oil SAE 0W-20
This is the high-mileage counterpart to Valvoline EP, listed in my post on Links to Prices; this motor oil is positioned above Valvoline High Mileage Full Synthetic, shown below

Valvoline High Mileage Full Synthetic Motor Oil SAE 0W-20
This is the high-mileage counterpart to Valvoline Advanced, listed in my post on Links to Prices

Other Posts by the Same Gladiator Owner

Oils, Fluids & Filters -- Lists & Guides For Jeep Gladiator
This post is a collection of links to my articles on fluids & filters for a Jeep Gladiator

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[Hunter#1]

On my 2012 Jeep Liberty I always used Pennzoil platinum, then when it hit 70K I used the high milage Pennziol platinum. Never a problem with oil consumtion, or leaking seals. I pretty much always used some sort Pennziol product. I feel it's the best.

 

[629]

I have run Valvoline high mileage oil in numerous vehicles for many years.

I currently run it in my 99 XJ Cherokee 4.0 and my 98 TJ wrangler 2.5. I also run it in two antique vehicles currently. I can’t tell you if it’s better or worse than anything else but none of my vehicles burn any oil on it. It does appear to slow small leaks. The TJ had a small leak after the first 3000 miles on it, it does not. It’s very inexpensive I usually buy it on Amazon for around 20 bucks for 5 quarts shipped.

I also run mobile 1 high mileage in my 87 K5, just because that’s what the previous owner ran. I’ve had it 15 years and it doesn’t drip or burn…so that’s a testament there. It’s the original engine.

But….my father taught me to work on stuff he did 3000 mile changes on these older vehicles and that’s probably more important than type etc.

Your mileage may vary.

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