Probably should avoid high mileage rated oils in my 2026 RAV4 PHEV

[Oldwolf]

I have a 2026 RAV4 phev that specifies 0w16 API SP oil. I have a left over 5qt bottle of mobil one extended performance high mileage 0w20 that's also rated API SP. Clearly it will work in my phev but I am wondering if I should avoid using this high mileage rated oil in my new engine until it's at 75k miles, which would be a long long time from now.

 

[UGASpike]

High-mileage oils are fine to use in new vehicles. I have reached out to Havoline on this since their Lifelong line at Walmart is all high-mileage formulations.

Penzoil Thread:

Thread 'Pennzoil Q&A - High Mileage Oil - Is It About 75K Miles or Seal Condition?'

Apr 10, 2026

Hi BITOG Members,

My name is Sean Nguyen, Technical Scientist and Automotive Lubricant Specialist with Pennzoil. I work closely with formulation and product performance, and I wanted to share some perspective on high-mileage motor oil and open it up for discussion.

High mileage oil inquiry comes up frequently here, particularly around whether it’s truly necessary in modern engines. I wanted to share some formulation perspective and also hear about your experience.

In the case of Pennzoil Platinum® Full Synthetic vs. Pennzoil Platinum® High Mileage, the high mileage product uses...

• wwillson
• Replies: 32
• Forum: Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

• 

Check out post #14

 

[buster]

It's fine. It's a question that has come up quite often over the years going back to early 2000's. Thom Smith who used to work for Valvoline back in the day said he used Valvoline MaxLife from the beginning in his car. Not needed, but won't hurt. Glad we finally got clarification on that, although that is Pennzoil's take. The issue always centered around "seal swellers" vs "conditioners" and what impact that had on elastomer materials.

 

[kschachn]

Both are API SP oils and both meet the seal-swell limits of that license. It will be fine.

 

[Oldwolf]

I'll hold on to it then and use it for one of my 5000k changes in between my Toyota provided 10,000k changes.

 

[wemay]

Both are API SP oils and both meet the seal-swell limits of that license. It will be fine.

This^, not an issue whatsoever.