James Thomas
"NO CLASS"
Re: which oil is best ...
I rate them as follows:
Tied for first - Redline, Royal Purple, Amsoil, Castrol Pure Synthetic
Second - Mobil One
Third - Castrol GTX
New engine break in - Castrol straight 30w or 10w30
Dave is correct in his above post about the Mobil One being reformulated, it ain't as good as it used to be. If you look at the engineering reports for vis. break down, load sheer, coke temp and the important two, pressure sheer & lubricisity etc. etc. , you will see any of the brands listed as "tied for first" are some what better than the "new" Mobil, a good bit better than Castrol GTX and TONS better than any thing else. All of the above listed are good oils, race proven and will do a great job if you do the following following in order of importance.
1. Oil temps don't exceed 230.
2. Fuel wash is kept to minium (really rich mixtures or repeated cranking of a non firing engine).
3. Proper weight for temp. & load
4. Filter changes at 2,500 - 3,000 miles for mineral based oils or blends & 4,000 - 6,000 (with good filters!) for synthetic's and some claim up to 8,000?
I know some just can't buy going 6K on an oil change but the endurance and lab tests prove it. I still change mine at 4,000 - 4,500 :tup: . Avoid short 10 minute or less drives, a turbo timer is a good idea & certianly if you have to do the "short hop" thing.
____________
James
I rate them as follows:
Tied for first - Redline, Royal Purple, Amsoil, Castrol Pure Synthetic
Second - Mobil One
Third - Castrol GTX
New engine break in - Castrol straight 30w or 10w30
Dave is correct in his above post about the Mobil One being reformulated, it ain't as good as it used to be. If you look at the engineering reports for vis. break down, load sheer, coke temp and the important two, pressure sheer & lubricisity etc. etc. , you will see any of the brands listed as "tied for first" are some what better than the "new" Mobil, a good bit better than Castrol GTX and TONS better than any thing else. All of the above listed are good oils, race proven and will do a great job if you do the following following in order of importance.
1. Oil temps don't exceed 230.
2. Fuel wash is kept to minium (really rich mixtures or repeated cranking of a non firing engine).
3. Proper weight for temp. & load
4. Filter changes at 2,500 - 3,000 miles for mineral based oils or blends & 4,000 - 6,000 (with good filters!) for synthetic's and some claim up to 8,000?
I know some just can't buy going 6K on an oil change but the endurance and lab tests prove it. I still change mine at 4,000 - 4,500 :tup: . Avoid short 10 minute or less drives, a turbo timer is a good idea & certianly if you have to do the "short hop" thing.
____________
James
