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Old 09-19-2004, 05:05 PM
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76REDSTINGER
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Default oil weight
what weight oil are you using ?
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Old 09-19-2004, 05:42 PM
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Summerfun
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10W40....BB, only used summer time..
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Old 09-19-2004, 06:12 PM
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The_Dude
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St. Jude Donor '11, '16-'17

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Delo 15w40
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Old 09-19-2004, 06:13 PM
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jn76vette
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Mobil 1 10w-30
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Old 09-19-2004, 09:12 PM
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Burnt71
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Pennzoil 10w-30 , 350 ci , no mods
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Old 09-19-2004, 09:19 PM
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Voo-Doo
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50W racing oil
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Old 09-19-2004, 09:33 PM
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markdtn
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5w30
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Old 09-19-2004, 09:41 PM
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Mike Ward
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Johnny Walker Blue label
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Old 09-19-2004, 10:04 PM
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Corvette_fetish
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Royal Purple 20W50
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Old 09-20-2004, 12:04 AM
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nastee383
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Originally Posted by 76REDSTINGER
what weight oil are you using ?
Right now Mobil1 15W50. I was using Royal Purple 5W30 until I wiped my cam. Probably not related but I'm just paranoid now.
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Old 09-20-2004, 01:55 AM
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lostpatrolman
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20w50? why so thick?
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Old 09-20-2004, 04:07 AM
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Corvette_fetish
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Originally Posted by lostpatrolman
20w50? why so thick?
Because my motor seems to burn less of the thick stuff.
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Old 09-20-2004, 09:20 AM
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Biker
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Penzoil 10W-30
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Old 09-20-2004, 09:33 AM
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pws69
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Originally Posted by nastee383
Right now Mobil1 15W50.
Same here - likes it.
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Old 09-20-2004, 10:27 AM
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marshrat99
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Mobil 1 10W30
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Old 09-20-2004, 11:34 AM
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BB wowbagger
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20-50 This is what my enginebuilder recomends
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Old 09-20-2004, 04:30 PM
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Frank75
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I suspect that heavier oil takes more power to pump around and creates more heat. It'd be interesting to try to quantify that some day with dyno runs I bet.
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Old 09-20-2004, 04:37 PM
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joe73vette
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I get about 5psi more with straight 30W than with 10W30 when the motor is warm. Since I never drive it in the winter, it's all I need. Joe
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Old 09-20-2004, 04:46 PM
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GTR1999
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10-40 year round
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Old 09-20-2004, 05:47 PM
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Clint's C3
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I'm running Mobile 1 in all my vehicles.

2001 Expedition- 0W/20. Less than 50K Mi on motor It gets better mileage with this viscosity.

1982 Vette, 1995 Z-28 and T/A- 10W/30

1994 V6 Mustang- 15W/ 50. It has 140 K mi on motor and uses less oil with this viscosity, < 1 qt in 5K mi.

1986 MasterCraft Pro Star 190. Ford 351 engine. 15W/ 50 keeps the oil pressure higher at idle.

An oil for very purpose....
Last edited by Clint's C3; 09-21-2004 at 10:08 AM.
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