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    Oil choices for 240Z race car

    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...
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    Oil choices for 240Z race car

    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...
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    Oil choices for 240Z race car

    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...
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    Oil choices for 240Z race car

    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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    Oil choices for 240Z race car

    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...
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    Oil choices for 240Z race car

    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...
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    Oil choices for 240Z race car

    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...
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    Oil choices for 240Z race car

    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...
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    Oil choices for 240Z race car

    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?
  10. M

    Oil choices for 240Z race car

    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...
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    Oil choices for 240Z race car

    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.?
  12. M

    Oil choices for 240Z race car

    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...
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    Oil choices for 240Z race car

    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...
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    BMW E30 - Mobil 1 confusion

    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...
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    BMW E30 - Mobil 1 confusion

    Originally Posted By: TrevorS Good choice with the M1. Pennzoil Ultra 5w40 also meets your specs and for me has different characteristics to the M1. There's also Castrol Edge 0w40. Again it meets your spec and you may prefer it. You should get the same cold start performance from any of these...
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    BMW E30 - Mobil 1 confusion

    Just over 500 miles now and only good news! Cold starts are amazingly easy; it's like it was 70 degrees out instead of 7. Very impressive. Not a noticeable increase in valvetrain noise thus far, no oil pressure problems, no oil comsumption yet (which just means it hasn't gotten worse), and the...
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    BMW E30 - Mobil 1 confusion

    Changed the oil with the 0W-40 today! I realize any valvetrain noise difference will probably become more apparent in the summer, but it seems pretty much the same now up to 5k. Oil pressure came right up, startup is hard to say since the car was still pretty warm, but I'm most impressed by the...
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    BMW E30 - Mobil 1 confusion

    Originally Posted By: stchman According to the specs I have read, that car calls for 10W-40 oil. You can safely use either 10W-40, 5W-40, or 0W-40 oil as it's all 40W at operating temperature. Walmart sells 5qt just of Mobil 1 5W-40 for a reasonable price. Thank you! I decided to go for the...
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    BMW E30 - Mobil 1 confusion

    Originally Posted By: Wilhelm_D The Mobil 1 0W-40 should provide better lubrication over a wider range of temperatures than your current motor oil. It's used with good results in many BMWs, Porsches, Mercedes, and other premium vehicles. The easiest way to see if it works is to try it...
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