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Oil choices for 240Z race car #5332721 01/26/20 12:54 PM
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michaelsvintage Offline OP
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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 things about the Datsun based on my British experience. Engine oil is one of those things. We use Royal Purple 20W-50XPR in everything else and it's worked very well (though I wonder if there's anything lighter we could use in there...), but I'm not going assume it's good for the Datsun because of that. I'm happy to provide specifics of the Nissan L24 engine if that would help, but this car is used for vintage road racing and as such sees 7,000rpm regularly.

First off, I've taken some time to attempt due diligence and avoid starting a new thread. I wasn't able to find much experience with the specific oils shared with me, so I'm going to address them directly. After talking with someone who has a lot of experience and asking which oils are good choices for this engine, I was given a short list:

Amsoil AMO/Premium Protection 10W-40
Joe Gibbs 10W-40
Motul 300V 10W-40
Rotella T6 5W-40

I know how good Amsoil products generally are, and I know 300V is popular with bikes at least, and that Rotella has a sterling reputation for flat tappet folks.

I'd lean towards the Rotella for myself because it's significantly less expensive than everything else, and it appears to still have sufficient additives for an engine like the L24, but I couldn't find much about anyone using the oil for racing.

Does anyone have experience racing any of these oils, or a link to info of that sort?

Thanks!

Mike

Re: Oil choices for 240Z race car [Re: michaelsvintage] #5332732 01/26/20 01:09 PM
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Powerglide Offline
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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.

Re: Oil choices for 240Z race car [Re: Powerglide] #5332752 01/26/20 01:27 PM
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michaelsvintage Offline OP
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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 one of the four oils listed above for the time being.

That being said, I use Mobil 1 0W-40 in my BMW E30 street car and love that stuff in a road context.

Re: Oil choices for 240Z race car [Re: michaelsvintage] #5332793 01/26/20 02:17 PM
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sloinker Offline
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'16 Tiguan TSI Vaico 5W40
'15 VW Golf TDI Ravenol VMP 5W30
'15 VW Golf Sportwagen TDI VMP 5W30
'14 Dodge Grand Caravan 3.6 Red Line Blue Label 5W20
'64 Plymouth Fury440 Red Line Blue Label 10W40
Re: Oil choices for 240Z race car [Re: sloinker] #5332799 01/26/20 02:22 PM
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michaelsvintage Offline OP
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Originally Posted by sloinker

I'll read up on it. I see the site is in German; how's price and availability in the U.S.?

Re: Oil choices for 240Z race car [Re: michaelsvintage] #5332839 01/26/20 02:58 PM
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Originally Posted by michaelsvintage
Originally Posted by sloinker

I'll read up on it. I see the site is in German; how's price and availability in the U.S.?


RUP isn’t available here anymore. Blauparts stopped selling it last year. You can still get the REP 5w30 though

Re: Oil choices for 240Z race car [Re: michaelsvintage] #5332960 01/26/20 05:14 PM
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Chris142 Offline
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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 becoming very thin under race conditions, so I'm going to stick to one of the four oils listed above for the time being.
.

Mobil1 15w-50.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Oil choices for 240Z race car [Re: Chris142] #5333007 01/26/20 05:57 PM
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michaelsvintage Offline OP
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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 becoming very thin under race conditions, so I'm going to stick to one of the four oils listed above for the time being.
.

Mobil1 15w-50.

That is a good oil, but I was told 50-weight is too think for this application.

Re: Oil choices for 240Z race car [Re: michaelsvintage] #5333051 01/26/20 06:44 PM
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Marco620 Offline
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Redline 30WT


15' Civic 1.8 i-vtec 310,000 mi M1 0w30 & LG Biotech, BP CVT Fluid,GUMOUT W/ PEA
Doberman Whisperer!
E pluribus unum.

Re: Oil choices for 240Z race car [Re: michaelsvintage] #5333132 01/26/20 07:55 PM
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sloinker Offline
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Originally Posted by michaelsvintage
Originally Posted by sloinker

I'll read up on it. I see the site is in German; how's price and availability in the U.S.?


Blauparts.com

This is the U.S. seller located in Wisconsin. Wait for their sales as it isn't the cheapest available, on a par with Amsoil price wise. The oil with PAO/Ester base is licensed in many grades for many applications, even the racing grades. If it has Group III it will be noted as a HC grade and you won't be paying extra for a less expensive base oil. Read the descriptions carefully as they have many formulations available that differ only slightly from one another. The grades with Clean Synto and USVO are PAO/Ester base oils and will note any add pack that is unique.


'16 Tiguan TSI Vaico 5W40
'15 VW Golf TDI Ravenol VMP 5W30
'15 VW Golf Sportwagen TDI VMP 5W30
'14 Dodge Grand Caravan 3.6 Red Line Blue Label 5W20
'64 Plymouth Fury440 Red Line Blue Label 10W40
Re: Oil choices for 240Z race car [Re: michaelsvintage] #5333186 01/26/20 08:56 PM
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Brad Penn 10w40.

Re: Oil choices for 240Z race car [Re: michaelsvintage] #5333195 01/26/20 09:05 PM
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michaelsvintage Offline OP
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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?

Re: Oil choices for 240Z race car [Re: michaelsvintage] #5333682 01/27/20 12:12 PM
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sloinker Offline
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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.


'16 Tiguan TSI Vaico 5W40
'15 VW Golf TDI Ravenol VMP 5W30
'15 VW Golf Sportwagen TDI VMP 5W30
'14 Dodge Grand Caravan 3.6 Red Line Blue Label 5W20
'64 Plymouth Fury440 Red Line Blue Label 10W40
Re: Oil choices for 240Z race car [Re: sloinker] #5333709 01/27/20 12:36 PM
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michaelsvintage Offline OP
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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 go. I'll be running oil temp, water temp, and oil pressure gauges so I'll keep a close eye on that. I haven't done it before; what do you think a good interval to get useable UOA data from a race engine would be? One race weekend is about an hour to an hour and a half of race time.

Re: Oil choices for 240Z race car [Re: michaelsvintage] #5339985 02/03/20 12:17 PM
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Renzo Offline
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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 the dino/cheaper oils than the dedicated race oils. Power drops off quick with valvetrain wear.

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