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Old 04-26-2008, 04:56 PM   #1
wopgenius
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Default High Mileage Oil in low mileage car?

Would using a high mileage oil, on a newer low miles car, have any positive affects long term on the engine? Just curious.
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Old 04-26-2008, 05:46 PM   #2
lionken07
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its called high mileage oil for a reason. Don't do it...
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Old 04-26-2008, 09:47 PM   #3
rkramer
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ask for oil opinions over here instead...
http://www.bobistheoilguy.com

In general the HM oils are fairly well regarded, INCLUDING the Mobil 1 varieties. They are usually thicker than the non-HM versions and may contain more detergents.
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Old 04-26-2008, 10:04 PM   #4
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There additives package also typically contain additives to keep the seals soft and pliable as seals tend to harden as time goes by. I don't at this time see any issues with running the HM oils in a low mileage engine. As long as you choose a the appropriate grade and weight for your application. It may actually lengthen the life of the seals that much more(shrug shoulders). Good question though, like rkramer said bitog is the place to start.
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Old 04-27-2008, 02:15 AM   #5
rexman2002
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No. I have 133K+ miles on my wrx, and I wouldn't put "high mileage" oil in my car. But I don't have high miles anyway. I use dino oil 10w30. Car runs like the day I bought it 7 years ago. No oil consumption.

Last edited by rexman2002; 04-27-2008 at 02:28 AM.
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Old 04-28-2008, 09:38 PM   #6
ruggedman
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When i went to the store one glorious oil change day they were all out of regular M1. I used the extended oil not even thinking twice, it's approved by passing the SAE tests required by subaru and it's the right viscosity as per subaru. I bought it, used it, and changed it. That was 12k miles and like 3 oil changes ago. I do UOA's and a check my oil levels EVERY gas fill up. I've never used any measurable amount of oil in my WRX, no need to worry about a re-badged oil. Life's too short to worry about a high mileage formula oil in a young car.
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Old 04-28-2008, 10:20 PM   #7
bulwnkl
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Quote:
Originally Posted by wopgenius View Post
Would using a high mileage oil, on a newer low miles car, have any positive affects long term on the engine?
No.

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Old 04-29-2008, 05:03 PM   #8
wopgenius
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Thanks for the answers. I am not going to do it, I was just pondering it. I thought if it is that much better for an older engine, why cant it be that much better for a new one? I'll stick with my synthetic and be just fine.
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Old 04-30-2008, 04:29 PM   #9
Big-E
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Sorry if this is late.

Do not use high-mileage oil in a moderately to low use car.

I switched from Mobil-1 in my Focus to Amsoil high-mileage oil. The Focus is a locally driven car that is stop & go. Within two weeks, the oil had the white swirls in it because of water accumulation from not being burned off due to the low use, stop & go use.

I switched back to Mobil-1 and have no water accumulation due to the low usage, no burn-off.

The high-mileage oil is designed so that if you're doing high driving miles in a relatively short period of time, you basically extend the mileage changing times.

Meaning, if say you do 6k miles in 6mos, you change the oil at the 6mos mark. If you did 6k miles in 3mos, you would change the oil at the 3mos mark. With the high-mileage oil, the idea would be that you do 12k miles in 6mos and then change it at the 6mos mark.

You get more for your money and more out of your existing resource pool.

From experience though, just don't use Mobil-1 in your Impreza.
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