Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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I plan on hopefully getting my car running by the end of the month. I broke the cam in last October and the put it away. I use to use Castrol GTX 20-50 in my 305 and my buddy swears by it in his 402 bb. Would this be a good oil to use with an aggressive cam for summer driving?
So im getting ready to break in my new motor with a hyd. flat tappet cam and my engine builder filled it up with penzoil 10w30. I went down to talk to him about running shell rotella to break the cam in and he told me not to listen to the BS lol i guess hes old school i dont know. Im not sure what to do either as i think the instuctions say to just use regular 10w30 oil hmm..
I went through 3 cams because of regular oil. I kept thinking it was an installation error, but regular car oil is formulated for modern cars.... almost none of which come with a flat tappet cam.
Either use diesel oil or you can buy GM Engine Oil Supplement.
You could run the castrol, cams aren't that expensive.
I will probably buy the EOS to add but the one and only hyd flat tappet cam i had installed before i had no problems breaking in with regular oil. I think half the problem is the quality of the cams being produced.
I will probably buy the EOS to add but the one and only hyd flat tappet cam i had installed before i had no problems breaking in with regular oil. I think half the problem is the quality of the cams being produced.
How long before? The problem with automotive oil is a relatively new problem. 10 years ago, 5 years ago, you may not have had this problem. Be selective with your break in oil. Use an additive and/or a deisel motor oil. You can debate the quality of the cams, but generally it is the oil which draws concern.
I found this at local web site(someone have copied this at Yours web site...)
Tässäpä jenkkiläiseltä keskustelupalstalta leikattu juttu, mihin kaveri on kerännyt eri öljyjen sinkkipitoisuuksia:
"BOTTOM LINE: Running an old engine without zinc in the oil is bad news-- especially when breaking in a fresh build. Ask around and you'll hear about high rates of camshafts going flat. Avoid the problem by choosing the right oil-- that has a zinc content of at least .11%. If you're running zero zinc content oil in an old engine, I believe you're asking for trouble.
I've done some research. Here is the zinc content of todays oils:
20W-50
AMSOIL (old) none
AMSOIL (new) none
Castrol GTX .12
Exxon High Performance .11
Havoline Formula 3 none
Kendall GT-1 .16
Pennzoil GT Perf. none
Quaker State Dlx. none
Red Line none
Shell Truck Guard .15
Spectro Golden 4 .15
Spectro Golden M.G. .13
Unocal .12
Valvoline All Climate .11
Valvoline Turbo .13
Valvoline Race .20
Valvoline Synthetic .12
20W-40
AMSOIL none
Castrol Multi-Grade .12
Quaker State none
15W-50
Chevron .11
Mobil 1 none
Mystic JT8 .15
Red Line none
No, for some reason, the *******s just failed to list the content in that document. They also failed to list important things like pour point, and flash point, but that in no way means that they don't *have* a flash point or pour point.
I got my cam from Lunati and to be on the safe side I called them and they recommed any racing oil. The tech said they have done many test on oil with there cams and only racing oil has come out on top. And he said it can been any oil( mobil,castrol,ect) long as its for racing.
