High-Mileage oil to keep the seals conditioned?

[strombony]

Originally Posted By: Mach5
Originally Posted By: ToyotaNSaturn
If it did fix your problems, then it wouldn't it be worth using to prevent such issue from occurring in the first place?


In the case of my old truck, it was a freebie from a friend. I used it to haul landscaping materials for my house. It had seen far better days before I got a hold of it.

I wouldn't use a HM oil in a low mileage car. I don't know what the long term effects upon the seals are. I'm willing to use HM oil in an attempt to fix seals that already have issues because I have nothing to lose. I'm unwilling to use it to fix a problem I don't have.



Interesting....Does anyone know of any negative long term effects from using a HM oil in a low mileage veh that has no problems?

 

[demarpaint]

I'd use high mileage oil when I have a problem that it might be able to solve. IMO its like taking medicine when you're not sick, save it for when you need it.

Frank D

 

[JDD]

PAOs shrink, Esters swell seals. The talking heads at XOM or wherever are going to use different words for swelling, but that is in effect what esters do to some gasket materials.
If you have a rear main leak on a GM----good luck. There's not anything that will fix it short of a replacement. Speaking from experience....

 

[LargeCarManX2]

Originally Posted By: BrianWC
Originally Posted By: StevieC
Yeah Redline would be good because of the PAO's in it generally make seals swell a tad.

Good Point LargeCarManX2


Redline is mostly ester, not PAO. PAO in general is reputed to shrink seals and esters swell (depending on the ester). But modern synths are formulated to avoid swell or shrinkage issues with seals.


Correcto....Esters and not Pao...mostly!

 

[BrianWC]

Originally Posted By: JDD
PAOs shrink, Esters swell seals. The talking heads at XOM or wherever are going to use different words for swelling, but that is in effect what esters do to some gasket materials.
If you have a rear main leak on a GM----good luck. There's not anything that will fix it short of a replacement. Speaking from experience....


Remember, though, not all esters swell seals.