High mileage additives sold seperately from oil?

[AdRock]

Basically, I believe my valve seals are leaking a little. I was running M1 5w-30. Switched over to M15w-30 EP a while back. On this next change I'm giving PP 5w-30 a shot to see how I like it.

I would like to have some of the high mileage additives that will help swell or soften the seals a little but don't want to switch to an HM oil. Are there any additives that I can get seperately and add to the PP when I do my next change, without adversely affecting the oil itself?

 

[lipadj46]

White shepherd's oil leak stop available at advanced auto

 

[AdRock]

Thanks for the info. I'll read up on it.

No one else has any suggestions? I know this isn't the only stuff out there someone has used before.

 

[mechtech2]

Valve seals? Maybe the stems and guides are worn.
In general, thicker oil helps burning/leaking - but at somewhat of a cost.

 

[daman]

Give M1 5w30HM a try,nice oil.

 

[artificialist]

Avoid using Lucas oil as an engine oil additive, it turns into foam.

 

[Geonerd]

Well, there's always the "Mystery Goo Ball" lurking in Fram's HM filter.

According to Fram, their "Industry exclusive, patented time-released gel additive conditions oil through the entire change cycle."
Whatever the heck that's supposed to mean!

 

[AdRock]

Originally Posted By: Geonerd
Well, there's always the "Mystery Goo Ball" lurking in Fram's HM filter.

According to Fram, their "Industry exclusive, patented time-released gel additive conditions oil through the entire change cycle."
Whatever the heck that's supposed to mean!

HAHA, I think I'll pass on that.

 

[AdRock]

Originally Posted By: mechtech2
Valve seals? Maybe the stems and guides are worn.
In general, thicker oil helps burning/leaking - but at somewhat of a cost.


Well, the 4.6's aren't really known for the guides getting worn that quickly. I have however fixed a couple stangs with hard valve seals. I think mine are finally leaking. I really don't want to go any thicker than the 5w-30 M1EP I'm using now.