after searching i found gc is about 12.2 cst and the cut off for 30 weight is 12.5cst? is there any thicker 30 weight or is gc the thickest?
thickest 30 weight?
- Thread starter irocurpony
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Probably the thickest without, say, mixing 50% 5w-30 with 50% 5w-40. The Castrol high mileage oils tend to be pretty thick too. 12.0 I believe for the 5w-30. Probably easier to find and less costly than CG.
Why are you looking for thick oils?
Why are you looking for thick oils?
IIRC Mobil 1 ESP Formula 5W-30 is another 12.1.
Amsoil Euro 5W30 is 12.3
Amsoil Euro 5W30 is 12.3
i think maxlife is pretty thick too
Originally Posted By: electrolover
i think maxlife is pretty thick too
MaxLife is around 11.5.
i think maxlife is pretty thick too
MaxLife is around 11.5.
Originally Posted By: hhu168
Originally Posted By: electrolover
i think maxlife is pretty thick too
MaxLife is around 11.5.
found it in the voa section "a whole bunch" 11.8 on the maxlife
also found chevron 300 10/30 is 12.0
im not sure if these are SL or SM specs
Originally Posted By: electrolover
i think maxlife is pretty thick too
MaxLife is around 11.5.
found it in the voa section "a whole bunch" 11.8 on the maxlife
also found chevron 300 10/30 is 12.0
im not sure if these are SL or SM specs
Get you some MaxLife 10W-30.
royal purple is 11.5 for their 10w-30 oil. great oil!
Rotella T5 synblend 10w30 is another 12.1 cSt.
its going in a 190k 94 z28 that gets raced 4 times a month figured with the mileage i would want to run the thickest 30 weight. owners manual says only use only 5w30 or 10w30 so i figured 40 weight would be to thick for my engines clearances.
Originally Posted By: irocurpony
its going in a 190k 94 z28 that gets raced 4 times a month figured with the mileage i would want to run the thickest 30 weight. owners manual says only use only 5w30 or 10w30 so i figured 40 weight would be to thick for my engines clearances.
A 40 weight would be fine in your engine.
its going in a 190k 94 z28 that gets raced 4 times a month figured with the mileage i would want to run the thickest 30 weight. owners manual says only use only 5w30 or 10w30 so i figured 40 weight would be to thick for my engines clearances.
A 40 weight would be fine in your engine.
Originally Posted By: irocurpony
its going in a 190k 94 z28 that gets raced 4 times a month figured with the mileage i would want to run the thickest 30 weight. owners manual says only use only 5w30 or 10w30 so i figured 40 weight would be to thick for my engines clearances.
you could run a 20/50 if you wanted and not hurt a thing. trust me I'VE had many sbcs at the track. truth be told you dont need any more than a 40 max. i suggest T6 5/40. it will hold up to the heat of higher rpms and is still thinn enough at start up to not need a warm up period, but its a good idea with any oil to get your car up to temp before redlining it
if your spinning it 8k or more you might think about VR1 it doesnt foam at extremely high rpms. but i have a feeling your turning it 6500 max being stock clearances and all
its going in a 190k 94 z28 that gets raced 4 times a month figured with the mileage i would want to run the thickest 30 weight. owners manual says only use only 5w30 or 10w30 so i figured 40 weight would be to thick for my engines clearances.
you could run a 20/50 if you wanted and not hurt a thing. trust me I'VE had many sbcs at the track. truth be told you dont need any more than a 40 max. i suggest T6 5/40. it will hold up to the heat of higher rpms and is still thinn enough at start up to not need a warm up period, but its a good idea with any oil to get your car up to temp before redlining it
if your spinning it 8k or more you might think about VR1 it doesnt foam at extremely high rpms. but i have a feeling your turning it 6500 max being stock clearances and all
Originally Posted By: electrolover
Originally Posted By: irocurpony
its going in a 190k 94 z28 that gets raced 4 times a month figured with the mileage i would want to run the thickest 30 weight. owners manual says only use only 5w30 or 10w30 so i figured 40 weight would be to thick for my engines clearances.
you could run a 20/50 if you wanted and not hurt a thing. trust me I'VE had many sbcs at the track. truth be told you dont need any more than a 40 max. i suggest T6 5/40. it will hold up to the heat of higher rpms and is still thinn enough at start up to not need a warm up period, but its a good idea with any oil to get your car up to temp before redlining it
if your spinning it 8k or more you might think about VR1 it doesnt foam at extremely high rpms. but i have a feeling your turning it 6500 max being stock clearances and all
yes my internals are 100% stock car runs 12.7 @ 106 with bolt ons just looking for a good protection to keep it healthy until i can afford a new motor
Originally Posted By: irocurpony
its going in a 190k 94 z28 that gets raced 4 times a month figured with the mileage i would want to run the thickest 30 weight. owners manual says only use only 5w30 or 10w30 so i figured 40 weight would be to thick for my engines clearances.
you could run a 20/50 if you wanted and not hurt a thing. trust me I'VE had many sbcs at the track. truth be told you dont need any more than a 40 max. i suggest T6 5/40. it will hold up to the heat of higher rpms and is still thinn enough at start up to not need a warm up period, but its a good idea with any oil to get your car up to temp before redlining it
if your spinning it 8k or more you might think about VR1 it doesnt foam at extremely high rpms. but i have a feeling your turning it 6500 max being stock clearances and all
yes my internals are 100% stock car runs 12.7 @ 106 with bolt ons just looking for a good protection to keep it healthy until i can afford a new motor
i had great luck with pyb 10/30 SL in my first camaro. it had a mild sbc carburated and ran 8.70 (1/8 mile). i only took it to the track once or twice a month and changed the oil on race day. of coarse it got more and more radical as time went by. ya know how that goes..
so i guess my point is with a mild car you dont need a super duper oil to make a couple passes at the strip. with the miles on your car i might pick a syn or blend like rotella T 10/30 or T6 5/40 which ever makes you more comfortable. im sure you will need to put some thought into your next oil choice, ya know for the engine you plan on building.
when you hit the 500hp mark then i would worry but for now pretty much anything will do. something will break but it wont be because of the oil, racing is a neverending search for the weakest link
so i guess my point is with a mild car you dont need a super duper oil to make a couple passes at the strip. with the miles on your car i might pick a syn or blend like rotella T 10/30 or T6 5/40 which ever makes you more comfortable. im sure you will need to put some thought into your next oil choice, ya know for the engine you plan on building.
The manual is irrelevant in your case. What matters is the condition of your engine during the operation when racing. The choice is dynamic. Get pressures at temperatures then you can figure it out. You may want to read my chapters beginning on the home page here.
It may be useful to do the same while driving around town as a different viscosity range may be indicated.
Then road test the oil you chose. Remembering that the "best" oil is not the thickest but rather the most appropriate. It should not be too thin nor too thick.
aehaas
It may be useful to do the same while driving around town as a different viscosity range may be indicated.
Then road test the oil you chose. Remembering that the "best" oil is not the thickest but rather the most appropriate. It should not be too thin nor too thick.
aehaas
i was looking into a thick 30 weight due to the age of the motor i figured my bearings have to have some wear. As of now on a hot summer day at idle i have about 10psi according to the factory gauge (i kno this is not reliable). I had the car since 140k and since then its been getting pp 5w30 and pure 1 oversize filters. The more i read about T6 im liking it maybe that and a oversize classic filter ill try now. Any idea what kind of oci i should do car will probaly not see 3k in 3 months.
i would drop it a bit while racing but stretch it some when im not. your not going to go to the track in the dead of winter, but in summer you will see it alot. with T6 i would change it once a month during the season and stretch out to 5k or so during off season. i know that seems like alot but assuming you go every weekend and put 5-10 passes on then its actually not that often considering how hard it is on oil.
another thing to worry about, if you use a trans brake or just the old foot brake launch its really hard on tranny fluid. especially with a bigger stall... food for thought
another thing to worry about, if you use a trans brake or just the old foot brake launch its really hard on tranny fluid. especially with a bigger stall... food for thought
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