View Poll Results: M1, RP, or GC (FULL SYNTHETIC)
Mobil 1 5w30
249
40.82%
Royal Purple 5w30
195
31.97%
German Castrol 0w40
166
27.21%
Voters: 610. You may not vote on this poll
Mobil 1 Royal Purple or GC
06-10-2007, 07:51 PM
#184
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i used RP on my LT1 94 z and lol that was a nightmare i was putting a quart a week in I use Mobile 1 with my Ls1 and wont change it! The Poll Speaks For It Self!
08-23-2007, 01:25 AM
#186
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as weird as it sounds i seemed to pick up more valvetrain noise with mobil 1 15w50? im going back to my original 5w30 soon i hope everything is ok in there 
she still has a few more months of rippin before shes shut down for the winter..
she still has a few more months of rippin before shes shut down for the winter.. 
08-23-2007, 09:22 AM
#188
I like the amsoil race oil. its all i use. i have not had any bearing iussues and spin the hell outa my car. but it sees very little street miles and i change the oil just about every race weekend so i might not have the long term data you need.
When it was a h/c only car i used mobil 1 put 90K on it in 3 years, motor looked good when we took it out.... other than the hydro locked cylander LOL
When it was a h/c only car i used mobil 1 put 90K on it in 3 years, motor looked good when we took it out.... other than the hydro locked cylander LOL
08-23-2007, 10:44 AM
#191
Originally Posted by raIDERspeed
Royal Purple sure looks impressive doesn't it?
I've been using this stuff for the last 4 years in my stroker and the motor is running as smooth and as strong as the day it was built with 30K HARD miles on the clock. If you have $$$$ invested in your motor then the extra few bucks for RP is warranted.
08-26-2007, 10:00 PM
#195
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Originally Posted by daryl2cb@yahoo.com
have you considered a catch can, upgrade your pcv valve, the oil your using is fine, I run it my self, others use the german castrol but is sometimes is hard to find. Is far as the purple, some swear by it, personally I would never run it, seems like a gimic to me, but I have never tried it so I really can not be a valid opinion as to its performance. But most that run it use the race blend 40, which I am told is the equivelent of a 5w-40.
There is no GC 5W 30.
08-29-2007, 12:10 PM
#198
Launching!
I dont have an LS1 (yet... 
) but I use Mobil 1 in my GTP and my Maxima. I use Castrol GTX in my 91 RS simply because the previous owner didnt take good care of the 305 thats in it now.
My GTP has 204,000 miles on the clock. Never a problem with bearings and such. It smokes a lil on start-up (valve seals) and when its been idling for a long time. It has a valve cover leak from hell though. Mind you, my GTP has had a HARD WOT life. Drag racing, top end blasts, etc. Most GTP's would have spun a bearing by now.
Mobil 1 for me!
) but I use Mobil 1 in my GTP and my Maxima. I use Castrol GTX in my 91 RS simply because the previous owner didnt take good care of the 305 thats in it now.My GTP has 204,000 miles on the clock. Never a problem with bearings and such. It smokes a lil on start-up (valve seals) and when its been idling for a long time. It has a valve cover leak from hell though. Mind you, my GTP has had a HARD WOT life. Drag racing, top end blasts, etc. Most GTP's would have spun a bearing by now.
Mobil 1 for me!
08-29-2007, 09:19 PM
#199
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I won't vote because I don't think there is that much difference to make a
a difference for me. I think of it as drinking Bud or Miller they are both premium beers.
a difference for me. I think of it as drinking Bud or Miller they are both premium beers.
08-30-2007, 12:49 AM
#200
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I normally run 5W-30 M1 in VA. When I was in Jacksonville I ran 10W-30 RP, because the M1 oil pressure was lower, below average. I even noticed the time the oil pressure drops in VA but they are short on Pep Boys and Napas for the RP. I think the hotter the weather the more the viscosity ie 10W, and the wieght -30 is more dependant on the mileage of the motor and wear. The Rp is deffinetly better if you drive daily, rp's 5W-30 is the same as m1's 10W-30, even after beating the life out of the oil. I get on my car WOT almost daily and It always has good oil pressure with RP, trough traffic or normal drive.