What would happen if ???

[lucerne06]

I have 4 qts of various oil's,PYB 5w30,castrol syntec blend 5w30, napa full synthetic 10w30 and Valvoline WB conv. 5w30, WHAT would happen if I used all four of them at once mixed together for my next oil change? CURIOUS

 

[HTSS_TR]

It is not optimal but the engine would not exploded with this blend.

 

[addyguy]

It would work like a sump full of 5w30 oil....it would lubricate, cool and keep the inside of the engine clean, like oil is supposed to.

 

[bepperb]

"It would work like a sump full of 5w30 oil....it would lubricate, cool and keep the inside of the engine clean, like oil is supposed to."

+1

 

[Jim 5]

I got one of my best UOA's in my '98 Chev K1500 (5.7L vortec) with a witch's brew of 5w30's and 10w30's. None synthetic.

 

[sciphi]

Run it. It's all good oil, the 3800 is a tank of an engine, and you need to use up a bunch of miscellaneous quarts. Good enough for the tuna!

 

[Camu Mahubah]

I dun know the Pennzoil and Valvoline might fight in the same cage!

 

[Jason8691]

Originally Posted By: lucerne06
I have 4 qts of various oil's,PYB 5w30,castrol syntec blend 5w30, napa full synthetic 10w30 and Valvoline WB conv. 5w30, WHAT would happen if I used all four of them at once mixed together for my next oil change? CURIOUS


Im sure all of them say they are compatible with other oils, so go for it!

 

[hpichris]

Nothing will happen as stated above. The oil would do it's job and life would go on