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which oil to use

sportred04

sportred04

New member
my GP has 175000 on it and was wondering if 15w40 would be bad to use in it. its wat we use at work for the semis. its free so if its not bad for the motor i might as well use it. its rotella t. has more cleaning detergents and such. jus thicker than the specified factory use oil.
 


well its not that i want to change its that its free from work and my car has 175000 on it. i no its not what the GM ordered but i wasnt sure if itd be horrible for it as the bearing and such are worn a lil more than a low mileage 3.8. i usually put 10w30 in it. moneys tight right now and its free. we do our trucks about every 30,000. i think itll be fine with it in it.
 


Should be ok in the summer, but not when its cold out. keep in mind that oil pressure will be higher, but factory oil galley holes were not designed for that thick of oil, so stay outta the high rpm range,as it may starve for oil on the top end.
 


i just stocked up
Bought a sh1t load of what ever fully synthetic was on sale when its around 3 bucks a quart vs 6-8 I stock pile but then again I do a lot of oil changes for people so that means more cash in my pocket

gtp is running 5-30 castrol edge Cause it was on sale for like 16 bucks for a 5 quarts jug

the crown vic is running 5-20 motorcaft synth blend also bought it on sale

and the truck is running rottela 15-40 cause a 2.5 gallon jug is like 24 bucks
 
Just stocked up at Napa as they have conv oil on sale for $1.99 and Gold filters are 40% off-air, fuel, oil. A really good deal IMO.:th_thumbsup-wink:
 
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