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I am using Brad Penn 20w-50 in '78 930.
High ZDDP, they say.
is it a good choice?
Old 04-07-2018, 02:38 PM
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Technically no. ZDDP, yes but you need the higher temperature resistance of the synthetic oils to prevent coking in the turbo which can break loose and clog up oil spray bars etc.


Rahl
Old 04-07-2018, 02:49 PM
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So, what you recommend?
Thanks
Old 04-07-2018, 03:55 PM
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^^^^ That's why I switched to Mobil 1.
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Old 04-07-2018, 04:02 PM
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Maybe someone already pointed this out, but Walmart sells Mobil 1 15/50 incredibly inexpensively, something like $27/5 gallon jug. Worth the trip. Tractor Supply only a couple of bucks more. John in CT.
Old 04-08-2018, 08:16 AM
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Quote: So, what you recommend?
Thanks

I don't know that am the best resource for oil...but from what I read most pure synthetic should be better than regular dino oil due to taking higher temperatures with out breaking down. if price is no option Amsoil and Mobil 1 are good and probably can run 5,000 miles no problem(maybe more due to 10 + quarts) but some still think 3,000 mi is best.

Rahl
Old 04-08-2018, 06:25 PM
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engine oil?

This Oil!
EsterCore. Look it up.





Sent from my iPhone while Driving
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Last edited by 1979-930; 04-12-2018 at 04:59 PM..
Old 04-12-2018, 04:54 PM
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^^^

A couple things worth mentioning about that "motorcycle" oil is that the product information sheet states that it is suitable for wet or dry clutches and integrated or non-integrated gearboxes (probably same for Mobil 1 V Twin), and even though it is marketed as competition/racing oil, it still has a complete additive/detergent package (verified by independent testing from some dude that lab tested dozens of oils - 540ratblog is his website), so no ridiculously short change intervals required.

Last edited by Rawknees'Turbo; 04-12-2018 at 06:01 PM..
Old 04-12-2018, 05:51 PM
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Silly me...and here I've been running Kendall GT1 20-50 all these years and all those miles{I've put 60k miles on my 930 alone}.

Come to think of it, everybody racing Porsche's in our little SCCA group in Seattle ran the same oil as well...nary a single oil related issue in any of the engines for all those years...

Damn, we must have been living a charmed life not to have exploded our engines...

I'm feeling so lucky, I think I'll go buy a lottery ticket right now!

Mark

Last edited by full quack; 04-12-2018 at 06:57 PM..
Old 04-12-2018, 06:53 PM
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^^^

Mark, it's your super sexiness that keeps things so well lubed - you could run goat piss in the engine and be just fine!!!
Old 04-12-2018, 07:00 PM
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Gibbs DT 50

I know I'm probably just buying into the hype but the specs on the Gibbs Driven DT50 seem to check all the right boxes.

https://lnengineering.com/joe-gibbs-racing-dt50-full-synthetic-15w50-aircooled-engine-oil-12-quarts.html

It's like they wrote the ad copy while looking at a picture of my car...
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Old 04-12-2018, 07:28 PM
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Oh stop it...I'm blushing....but I did just have go look in the mirror to check things out, wink, wink, nod, nod, say no more, say no more.

Mark
Old 04-12-2018, 08:10 PM
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Don’t drink the Kool Aid........
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Old 04-13-2018, 03:03 AM
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Valvoline VR1 or Kendall GT-1
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Old 04-13-2018, 03:48 AM
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Quote:
Originally Posted by patina View Post
Valvoline VR1 or Kendall GT-1
Is that the same stuff?

I was running the VR-1 for awhile. But looks like it's hard to get/discontinued.
I've also used Brad Penn, as that was what was recommended/used by my shop.
I've since switched to Mobil 1.

All the above have been touted as good choices for our cars. My car has about 110K miles on the original motor, and I've put about 40K of those on it, myself.
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Old 04-13-2018, 12:38 PM
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I’ve used Valvoline VR-1 for years without any known issues. However it would be hard to believe major brands would not meet the specifications or quality to use in the 930 engine in this day in time. I would think the quality between the major brands would be minimum.
Old 04-13-2018, 05:25 PM
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I think this statement on the Valvoline website is interesting in regard to your comment:

“What is the controversy surrounding the amount of zinc in motor oil?
The controversy exists as a result of many hands-on car enthusiasts and engine experts belief that lower levels of zinc in API SN and SM motor oils can cause excessive wear in older style push-rod and flat-tappet engines. They hold this belief despite the fact that all new motor oil classifications are intended to be backward compatible.“

https://www.valvoline.com/about-us/faq/racing-oil-faq

Also, VR-1 is not a synthetic, and the 930 is not a flat tappet engine.

Quote:
Originally Posted by POR212 View Post
I’ve used Valvoline VR-1 for years without any known issues. However it would be hard to believe major brands would not meet the specifications or quality to use in the 930 engine in this day in time. I would think the quality between the major brands would be minimum.
Old 04-13-2018, 07:37 PM
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Quote:
Originally Posted by Speedy Squirrel View Post
I think this statement on the Valvoline website is interesting in regard to your comment:
backward compatible.“
Whats that?
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Old 04-14-2018, 08:27 AM
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This is in regard to the API service category. From the American Petroleum Institue website:

“For automotive gasoline engines, the latest engine oil service category includes the performance properties of each earlier category. For example, if an automotive owner's manual calls for an API SJ or SL oil, an API SM oil will provide full protection.”

Quote:
Originally Posted by quattrorunner View Post
Whats that?
Old 04-14-2018, 01:36 PM
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I used mobil synthetic 15w 50 for as long as I can remember. About 40,000 miles over a lot of years. Good stuff as far as I can tell.
I actually looked here to see if there was something new I should look at but it looks like I have the right stuff. Thanks
Old 09-06-2018, 01:01 PM
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