Oil i would use 5W30 if it is cool to cold where you are, or if its hot where you are, i would use 10W30, as for the coolant, that vehicle calls for DexCool. Do not mix coolant types. Dexcool is a redish colour. The resivor will have a cap that had either red or green writing on it, if it is red, use DexCool, if it is green, use the regular ethaline glycol.What is the best oil viscosity for 95 silverado 5.7? also what grade coolant should i be looking for?
If the engine has over 50,000 miles on it use a good quality 10w30 in the winter and 10w40 in the summer. Over about 125,000 I'd use a good 20w50 in the summer for extended daily temps over 90-95 deg.
As far as coolant...Dex-Cool is in the process of settling lawsuits for cooling system and engine damages! This stuff clogs cooling systems-period! Use regular antifreeze. Its cheaper and despite what some people will tell you it will not harm your engine or any seals-period! The water pump has the same seals as pre-dexcool water pump seals-period!
Hope this helps.What is the best oil viscosity for 95 silverado 5.7? also what grade coolant should i be looking for?
5W30 when it is cold.... the winter.... and 10W30 in the summer or warm to hot weather. As for coolant I just regular prestone 50/50.
Depending if your loosing oil or not.. If no go to www.lubedealer.com/alabamaamsoil Amsoil 0W-50 last for 35000 miles between oil changes and is 100% Synthetic! There is nothing better. They have racing oils, diesel etc.. if you loose oil or need to refill it regularly.. use a 10W-30 from walmart.
10w30 should cover most conditons hot and cold, and dexcool(orange) is factory. if yours is green, flush and replace with the correct type. i own a 97 z71 w/180,000 mi. oil change every 3000 and flush coolant every 2 yrs w/ 1 waterpump replaced at 100,000
every vehicile that i have owned and just about all of them are some make of general motors all i run is valvoline 20W50 racing
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