Question regarding oil.. I think 5w30 is to thin?
#1
Question regarding oil.. I think 5w30 is to thin?
Since i have owend my Trans Am i have always used syn 5w30 in the car. Either Mobil 1 or Pennzoil.. Motor was always quiet.
Now ever since i had my cam installed (2007) I still use 5w30. Put i have the sewing machine sound. I have the wrong size PRs. They are jsut a little to long. I got the 7.425s when i should have gone with the 7.4s..
But my question, being that 10w30 is a tad bit thicker than 5w30, do you think it will quiet the valve train down a bit? Seems to have gotten a little bit louder
What do you all think? BTW car is not a DD, i put on about 1,500 miles a year..
Thanks
Now ever since i had my cam installed (2007) I still use 5w30. Put i have the sewing machine sound. I have the wrong size PRs. They are jsut a little to long. I got the 7.425s when i should have gone with the 7.4s..
But my question, being that 10w30 is a tad bit thicker than 5w30, do you think it will quiet the valve train down a bit? Seems to have gotten a little bit louder
What do you all think? BTW car is not a DD, i put on about 1,500 miles a year..
Thanks
#3
TECH Senior Member
iTrader: (8)
The operating viscosity of those two oils are the same so there is really only a difference at start up.
My valvtrain is a little noisy too with 7.4's no mill GM MLS HG so my ?? to you is have you measured. I didn't I just went with what TSP said was good....
But oil wiil not make it quieter to answer your question. Actually a thicker oil would bleed the lifter down slower and make it noisier in theory....
My valvtrain is a little noisy too with 7.4's no mill GM MLS HG so my ?? to you is have you measured. I didn't I just went with what TSP said was good....
But oil wiil not make it quieter to answer your question. Actually a thicker oil would bleed the lifter down slower and make it noisier in theory....
#4
The operating viscosity of those two oils are the same so there is really only a difference at start up.
My valvtrain is a little noisy too with 7.4's no mill GM MLS HG so my ?? to you is have you measured. I didn't I just went with what TSP said was good....
But oil wiil not make it quieter to answer your question. Actually a thicker oil would bleed the lifter down slower and make it noisier in theory....
My valvtrain is a little noisy too with 7.4's no mill GM MLS HG so my ?? to you is have you measured. I didn't I just went with what TSP said was good....
But oil wiil not make it quieter to answer your question. Actually a thicker oil would bleed the lifter down slower and make it noisier in theory....
So i am now wondering if i shoudl go with 7.350 PRs then???
#5
TECH Senior Member
iTrader: (4)
The only way to know for sure is to measure. As for oil, as previously stated, the two oils are the same viscosity at temperature. If you are looking for a higher viscosity oil, German Castrol 0W-30 has about the highest viscosity I have seen that is still within the 30 weight range.
#6
TECH Fanatic
iTrader: (73)
Your best bet is to get a PR length checker and get it spot on instead of guessing. The proper length PR and correct preload should silence it some, but I wouldn't expect total silence out of your valvetrain.
As for switching to 10w-30, that won't work. Some have had good experiences with German Castol though due to its viscosity.
As for switching to 10w-30, that won't work. Some have had good experiences with German Castol though due to its viscosity.
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#8
The only way to know for sure is to measure. As for oil, as previously stated, the two oils are the same viscosity at temperature. If you are looking for a higher viscosity oil, German Castrol 0W-30 has about the highest viscosity I have seen that is still within the 30 weight range.
#10
Find me an oil that someone hasnt bitched about and Ill use that.. good luck.
#14
GC is not ****. Obviously, you're looking for someone to tell you that your reality can be realized by using 20W-50. She'll be quite then. Jut don't plan on cam & rod bearings to be happy in a daily driver. Unless, of course, you have a pre-oiler & run your oil temps @ 280*F.
Go to Bob is the oil guy. Use oil analysis will confirm that GC is not ****. You're trying to use oil to quiet a valvetrain. That's not what oil is for. Set your valve train up correctly & use a proven oil as confirmed by used oil analysis.