Mixing T&S and GC

[Racerjk]

What are your opinions on mixing in a quart of Mobil Truck and SUV in with German Castrol?? I have one quart of the T&S left. I will be using GC for the first time, so I would like to see how well the GC does by itself. However, I would also like to get rid of the M1.

 

[Jason8691]

That would depend on how much oil your vehicle holds, and how thick you want you oil to be. I mixed in two qts of Castrol 5W40 in with four qts of GC in my GTO with no adverse effects.

 

[Racerjk]

It will either go in an Lt1 Formula or my wife's GTP.

The Formula holds 5 qts, and the GTP 4.5.

 

[williar]

No problem, your engine will probably not know the difference as the oils are compatible and not too different. I'd probably dump it into the LT1.

 

[glxpassat]

I just bought a quart of Syntec 5w-50 for topping off since my car burns a little GC. The 5w-50 smells just like M-1 T&SUV,btw. Anyway, I put about .25 quarts in last night which shouldn't effect anything, but I swear it feels like I've had another passenger in the car with me today. GC by itself seems to add some pep to my motor and I may not mix it in the future.