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Author Topic:   oil weight!
rickb33
Dirt Full Roller

Total posts: 46
posted March 09, 2003 05:17 PM
my motor runs around a 5/16 mile dirt oval at 6,300 rpm range,and i've been using heavy oils like 20w50,or straight 50w.i want to start using a lighter oil.gasoline motor,9.5to1 compression.trying to find extra power wherever i can.would it cool better by dropping the weight.what weight would you recommend,and what do you think would be a good octane for a 9.5to1 engine.

odb93
Dirt Freak

Total posts: 214
posted March 10, 2003 10:28 AM
Do you run full synthetic?

rickb33
Dirt Full Roller

Total posts: 46
posted March 10, 2003 03:34 PM
i'm thinking about using it,but i could just stay with normal oil.what do you think.

outlawstock17
Dirt Forum Champ
Total posts: 620
posted March 10, 2003 04:09 PM
go with the synthetic. cheap horsepower, fewer oil changes.

ryan
Dirt Freak

Total posts: 430
posted March 10, 2003 09:18 PM
How many nights before an oil change with Mobil synthetic.

dirtracer50
Dirt Full Roller

Total posts: 42
posted March 10, 2003 09:54 PM
I use the mobil 1 synthetic and change the oil every 4 or 5 nights unless the motor gets hot then I change it more often. I've never had an engine failure with this schedule.

outlawstock17
Dirt Forum Champ
Total posts: 620
posted March 11, 2003 06:05 AM
i ran my mobil 1 engine 25 races and changed the oil 4 times all season. bearings looked like new. change it every 6-7 races as per sdhnc29 on another post. hey, somebody agrees with me! unbelievable!

rickb33
Dirt Full Roller

Total posts: 46
posted March 11, 2003 09:16 AM
what weight?

outlawstock17
Dirt Forum Champ
Total posts: 620
posted March 11, 2003 02:48 PM
15w-50

Speed Racer X
Dirt Full Roller

Total posts: 61
posted March 11, 2003 09:35 PM
Is this Mobile One a special racing oil, or is it the same stuff on the shelf at WalMart.

dirtracer50
Dirt Full Roller

Total posts: 42
posted March 11, 2003 09:49 PM
I buy mine at wal mart whenever they have the gallon jugs on sale. It's the cheapest I've found it yet.

racer17j
Dirt Forum Champ
Total posts: 1565
posted March 11, 2003 09:58 PM UIN: 54865418
i renber reading one time in i believe it was stock car mag that they don't recomend using syn oils in dirt cars anybody else see that?

armintroutracing
Dirt Roller

Total posts: 18
posted March 12, 2003 01:45 AM
yes i saw the same mag. i going to stick with my 20-50.

odb93
Dirt Freak

Total posts: 214
posted March 12, 2003 09:31 AM
Why would you not run sythetic on dirt?

Have you read the other post below with about three pages on oil?

HONDO
Dirt Full Roller

Total posts: 28
posted March 12, 2003 07:06 PM
I also run 15w-50 mobil 1 on dirt track. No problems ever. I change it every 3-5 races unless I get hot. Engine is on gas. I previously ran Havoline 20w-50 with Justice Brothers heavy duty oil treatment and had good luck, but the Mobil 1 won out on the dyno. The engine looks like brand new when we tear it down once a year.

dirtracer50
Dirt Full Roller

Total posts: 42
posted March 12, 2003 09:30 PM
Hows it going Greg? I just figured out who you are on here. What kind of power difference did you see on the dyno with the mobil 1.

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