Which is the best High Mileage Oil

Elroy the Unique · Mar 17, 2005

I have small leak and I want to try a high mileage oil.

Is the general consensus around here that Valvoline Max-Life is the best High Mileage oil?

High Plains Drifter · Mar 18, 2005

Consensus on this site? Are you kidding me.

I would'nt be afraid of the Valvoline. You may also consider the Pennzoil HM as it is pretty good. I have also heard of someone here using a HDEO such as Rotella/Delo/Delvac 15w-40 to stop a leak but not sure if the vicosity range would be suitable for your application.

Elroy the Unique · Mar 18, 2005

What about Castrol GTX High Mileage?

williar · Mar 18, 2005

I'd buy whatever you can get cheapest if you got a leak. After you get the leak fixed, I'd go with Pennzoil HM. Read some of the UOAs on this oil and I bet you'll agree.

haley10 · Mar 18, 2005

quote:

Originally posted by Elroy the Unique:
What about Castrol GTX High Mileage?

It's good stuff.

I wouldn't guarantee that any HM will stop a leak though.

TallPaul · Mar 18, 2005

The Valvoline Maxlife is good stuff, but so are some of the other HM oils, so unless you are a Valvoline nut like me, go with what you can get a good deal on. Might be a good idea to stick with the same brand for a while at least until the leak is gone.

There always is Auto Rx for leaks and general engine cleaning.

Here is an interesting post on HM oil fixing leaks, which describes the process similar to the Auto Rx process.LINK But don't be alarmed, Auto Rx or HM oils do not always result in temporary leaks during the seal reconditioning process. I have used both and not noticed any leaks.

[ March 18, 2005, 03:38 PM: Message edited by: TallPaul ]

MarkC · Mar 18, 2005

I am using Chevron High Mileage, and my UOA looks pretty good...

kreativ · Mar 18, 2005

Both Pep Boys and Kragen stores have MaxLife Stop Leak additive for free-after-rebate (rebate sticker on bottle). It looks to be a combination of seal conditioners and anti-wear additives - just add it to any regular oil (they specifically warn you NOT to use it with a high mileage oil).

KJA426 · Mar 18, 2005

I have SL-rated Castrol GTX High Mileage 10w-30 in my 4.7 Dodge since I seem to have a very minor leak around the front of the oil pan. I'm not sure but I think my mileage has dropped a little since the Castrol is a little thicker when hot compared to Mobil 1 10w-30.

Drew99GT · Mar 18, 2005

quote:

Originally posted by KJA426:
I have SL-rated Castrol GTX High Mileage 10w-30 in my 4.7 Dodge since I seem to have a very minor leak around the front of the oil pan. I'm not sure but I think my mileage has dropped a little since the Castrol is a little thicker when hot compared to Mobil 1 10w-30.

It's thicker overall by a decent bit. 40C: Mobil 1 is 60Cst, GTX HM is roughly 82Cst. 100C, Mobil 1 is 10Cst, GTX HM is 12.1Cst

Camu Mahubah · Mar 19, 2005

I wonder... these leaks... if they are small then maybe the Hi Mi will help? Not so sure.
I think they are good stuff though I only install one quart of Max Life with the rest All-Climate on my mother's Dakota.

Which is the best High Mileage Oil

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