i run 10w30 synthetic typically, but my nos turns it to capaccino; i was told 20w50 would work good, what do you guys use with or with out nos?

 

Mobil1 10-30, no funny stuff.

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ZZ4 crate motor,Stock tuned port,afpr,700R4 art carr shift kit,3.42 posi drums,Eibach pro kit,poly bushings throughout,yadayadayada

 

Quaker State 20w50, no problems in 6 years.

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Rob Kowalski
85 IROC, 305 TPI, JET AFPR - 45 PSI, B&M Shift Kit, SLP Airfoil, SLP headers and cat back system, gutted airbox, K&N, more to come!!

 

Mobil 1 5W30.

 

5w30 doesn't run well on n20......put 15w30 in and things seem fine....who knows why?

 

First:Pennzoil GT Performance 20W50
Now:Castrol RS Synthetic 10W60
Future:Castrol RS Synthetic 0W40 (new!)

 

Mobil 1 10W30, fully synthetic motor oil.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

Soon to Come: 7.625" 10 Bolt with 3.42s and Accel TPI Intake Base

 

can anyone explain what the different grades do????

 

91,

The protection and lubrication are not just a function of the viscosity of the oil. There is a lot more involved than just the SUS ratings.

Oils must have an adequate base stock, without a doubt. But two oils of equal base stock and viscosity can have completely different characteristics, and most of that is dependent upon the additive packages. Mineral oils tend to be a real compromise in an automotive engine. The best oil to lubricate a roller chain (like the cam drive) where penetration and adhesion (cling) are important, is not necessarily the best oil to lubricate sliding parts, like rings and lifter bodies, where film strength and cohesion are important. This same oil must have enough adhesion and extreme pressure film strength to lubricate the distributor gears, and yet flow well enough to move through the cam, main, and rod bearing areas to take away the excess heat and any particulates. The oil must have adequate emulsification properties to hold particles in suspension so that they can be trapped by the filter, but not so much that they trap water molecules and carry them to the main and rod bearings where they would do the greatest damage.

It's not just how thick the oil is, but also how well the viscosity remains stable over a wide temperature range. Oil in a case that has been sitting overnight in 40°F air must flow well enough to be able to pump and lubricate immediately on start up, but remain thick enough to provide film thickness and cohesion at higher temperatures once the engine had warmed up a couple hundred degrees.

Any 10W-whatever oil is the same as any other? I don't think so...

I could write a few more pages, but you get the picture.

Incidentally, the whole oil world just got a little smaller, since Mobil is now owned by Exxon. My industrial oil suppliers have already warned me that the old common Mobil products would soon be unavailable in their current forms, and they would be supplanted by new Exxon-Mobil product numbers and formulas. In some cases, Exxon would use it's current formulations, and in some cases would use the Mobil formulations. As a dedicated Mobil 1 synthetic user, I don't know how this will affect the availability of my favorite engine oils. I would suspect that Exxon-Mobil would continue to market the consumer product under the "Mobil" brand, since Mobil is more widely recognized and respected by both the motoring public and industrial markets as the leader in synthetic lubricant technology. Only time will tell.

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Later,
Vader
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"What a Day..."
Adobe Acrobat Reader

 

5w-30 Castrol

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Sportsman II 72 CC heads, Pete Jackson gear drive, Performance Resources chip, Edelbrock 1 5/8" headers and Edelbrock cat back exhaust, hi-flow cats, Trans-go stage 3 shift kit, Vigilante 9.5" 2800 stall convertor, SLP cold air induction, SLP roller camshaft, 24lb ADS injectors, AFPR, 3.45 rear end gears, and other goodies...


raven

 

Crisco cooking oil.

Superb frictional redution, amazing horsepower gains, 100% N2O compatible, smells good and looks cool; but most importantly:
CHOLESTEROL FREE!

 

vader; thanks for trying to explain......do u think u could give a short explanation on what the individual numbers before and after the w stand for?

F22Raptor, does your cooking oil come with any synthetic additives?

 

the way multigrade designations work is the first number listed is the weight of the oil at a cold temp (I forgot what it is, I think it's at 0 degree- F) and the second digit is the hot temp (32 degree+ F) so take a 5W-30, it acts as a 5 weight at low temperatures, and a 30 weight at higher temperatures.