inline six 250 oil viscosity - The 1947 - Present Chevrolet & GMC Truck Message Board Network

samstheman · 03-10-2011, 12:18 PM

What viscosity oil should I run in inline 6 250 in calif. synthetic or standard oil What do you think. I pulled valve cover had some deposit in head.

lilpoindexter · 03-10-2011, 10:08 PM

Synth oil has smaller molecules that can fit in places regular oil doesn't, so it can cause more leaks. i doubt you need the synth oil. I bough 10w30 for my 78 250, but I havent changed the oil yet...I think a straight 30 weight would be good.

03-10-2011, 12:18 PM	#1
samstheman Registered User Join Date: Nov 2010 Location: whittier calif Posts: 160	inline six 250 oil viscosity What viscosity oil should I run in inline 6 250 in calif. synthetic or standard oil What do you think. I pulled valve cover had some deposit in head.

03-10-2011, 10:08 PM	#2
lilpoindexter Registered User Join Date: Sep 2010 Location: los angeles Posts: 1,134	Re: inline six 250 oil viscosity Synth oil has smaller molecules that can fit in places regular oil doesn't, so it can cause more leaks. i doubt you need the synth oil. I bough 10w30 for my 78 250, but I havent changed the oil yet...I think a straight 30 weight would be good.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.