You guys use high mileage engine oil?

[YNOT]

The Tahoe I bought has a tiny bit of the GM knock sometimes when I start it up cold and then it goes away pretty fast. It didn't knock at all the day I bought it. (go figure)

Should I be running high mileage oil in it since it has 105,000 on it? i've always just used valvoline 5w30 in my stuff.

 

[odie301]

i bought my 04 with 105,000 on it..and i run valvoline synpower 5w-30... i dont know if it had synthetic from the previous owners or not..but it didn't leak or burn anything off so i put in full synthetic. But if you want high mileage oil it won't hurt anything. It just has different stuff in the aditive package... meaning they add stuff to help swell seals back to original (therefore helping to stop leaks) and also has more cleaning agents to help keep lifters and rings moving freely.

 

[Grocery Getter]

The Tahoe I bought has a tiny bit of the GM knock sometimes when I start it up cold and then it goes away pretty fast. It didn't knock at all the day I bought it. (go figure)

Should I be running high mileage oil in it since it has 105,000 on it? i've always just used valvoline 5w30 in my stuff.

Replace all lubricants with Royal Purple.....Tranny, Crank Case, Differential......you'll be real glad you did

 

[WickedGoat]

The Tahoe I bought has a tiny bit of the GM knock sometimes when I start it up cold and then it goes away pretty fast. It didn't knock at all the day I bought it. (go figure)

Should I be running high mileage oil in it since it has 105,000 on it? i've always just used valvoline 5w30 in my stuff.

Sounds like typical GM piston slap. You can use the high mileage oil in it and it won't hurt anything.

 

[3blackchevys]

We use a high mileage oil in our 89 Jeep. 140,000 + miles, 1 owner being my dad. started using Valvoline high mileage, then Castrol and has been using Mobil high mileage for a few years now

 

[Fyrcaptain]

I saw on another board that someone used high mileage M1 and it cured all of his engine clicks and clacks that many folks have.

 

[Yuk_Nali_6.0]

I've always used Castrol GTX High Mileage with no complaints.

 

[Donkey Punch]

Replace all lubricants with Royal Purple.....Tranny, Crank Case, Differential......you'll be real glad you did

+1 though I haven't done the tranny just yet...

 

[Max]

5w30 royal purple at 100k and compression is stock or down only one point on all cylinders. Purple in the diffs, gm fluids in the trans and tcase.

 

[Chads93GT]

I use the high mileage valvoline, but I have 281782 miles right now as i look at my dash .

105k miles aint shit.