Recent content by michaelsvintage

Originally Posted by dlundblad I'm having a hard time believing there'd be that much in oil pressure difference between 2 brands assuming they used the same viscosity both times. No way. An owners manual says basically 5w30 to 20w50 is safe to use depending on temperature. Just throwing this...

Originally Posted by Powerglide An L series motor as assembled by Nissan is an EXTREMELY durable engine. Years ago it wasn't uncommon to utilize a high mileage (150k or more) motor, replace the timing chain, do a valve job and put the motor back into service under RACING conditions. Rebuilds...

Originally Posted by kschachn Originally Posted by michaelsvintage Originally Posted by dlundblad All oil gets watery when hot. It's not pancake syrup when it's 200+*F. Yes, I mean relative to other oils. One racer described a 20psi loss in running oil pressure, compared to 2psi under similar...

Originally Posted by dlundblad Originally Posted by michaelsvintage Originally Posted by Jackson_Slugger The also make a 0W-30 and a 0W-50 specifically for racing: https://mobiloil.com/en/motor-oils/mobil-1/mobil-1-racing-oil Yes, thanks! I've talked to a couple Z racers and they said the...

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Originally Posted by Jackson_Slugger The also make a 0W-30 and a 0W-50 specifically for racing: https://mobiloil.com/en/motor-oils/mobil-1/mobil-1-racing-oil Yes, thanks! I've talked to a couple Z racers and they said the Mobil 1 oils get very "watery" when they get hot. As these engines don't...

Originally Posted by A_Harman The first 3 oils in your list are good for high-performance gasoline engines. I wouldn't use RT6 in this application. Its later formulation has decreased zddp content, which is detrimental to valvetrain wear. I would add Redline 40WT to the list, but the Joe Gibbs...

Originally Posted by Renzo If you spend a lot of time at high RPM's and/or have a lot of fuel dilution, dont use Rotella. The Joe Gibbs or the 300V would be my choice. Have done lots of work on track cars with flat tappets (M20 BMW's) and there was noticeably more cam wear/rocker arm wear with...

Originally Posted by sloinker Rotella isn't usually associated with racing but has billions of observable miles and many many satisfied users in the trucking industry. Try it and run some UOA's and see how it performs. Maybe add an oil temp gauge to monitor when racing. Alright, I'll give it a...

Alright, it's good to be getting some suggestions. Does anyone have racing experience or knowledge with any of the four oils I mentioned, specifically the Rotella which isn't "branded" as a performance oil?

Originally Posted by Chris142 Originally Posted by michaelsvintage Originally Posted by Powerglide My 280z seems to like Mobil One HM Full Synthetic. But it's a completely stock Fuel Injected car with only a header and free flow exhaust. Thanks for replying! I've seen and heard of Mobil 1 oils...

Originally Posted by sloinker Not on your list but I would use this: https://www.ravenol.de/en/application-area/passenger-cars-1/ravenol-rup-sae-5w-40/ I'll read up on it. I see the site is in German; how's price and availability in the U.S.?

Originally Posted by Powerglide My 280z seems to like Mobil One HM Full Synthetic. But it's a completely stock Fuel Injected car with only a header and free flow exhaust. Thanks for replying! I've seen and heard of Mobil 1 oils becoming very thin under race conditions, so I'm going to stick to...

Hi everyone! Little background: My Dad and I have a vintage race shop which takes care of primarily British vintage race cars, but I just bought myself a Datsun 240Z to hopefully have fun with now and then. It's a little out of our regular wheelhouse and I'm trying to be careful not to assume...

Hi again everyone! I apologize for the large timespan without updates; unfortunately, about a week after my last post the car was involved in an accident and was off the road until about a month ago. Since then, I've put about 1,000 miles on the car and there have been nothing but positive...