V8 XW Ute/APV Kitted EBII
Join Date: Dec 2002
Location: Sydney - West - Originally Tas
Re: tapping noise in 302 xc
Guys...a quick lesson in oils!
20W-50 and 20W-70 is the same viscosity.
All oils have the viscosity (thickness) in the first number eg 20W
The second number is the temperature that the oil is rated in loaded conditions. Therefore if your towing alot (horse floats, boats) then 20w-70 would be better than 20w-50.
Also if you look on the back of most oils, there will be an API standard followed by eg. SL/CF. The first letters give you the quality of the oil. The second set of letters are the diesel ratings. The higher the prefix eg 'SL' then the better the oil quality. These days SL is the highest rating. Cheaper oils have prefix SG or SF. You will find Shell, Penrite, Castrol and Pennzoil to be the better brands or the unknown French oil Motul which is awesome.
Nothing beats the sound of a V8