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diesel oils for the Corvair. Richard1 please comment
Posted by: Bob Helt ()
Date: February 09, 2018 06:54PM

So the most common viscosity of 10W-30, for some unknown reason is available both as a pure CK-4 diesel oil and also as a CK-4/SN oil that is applicable to both diesel and gasoline engines (called a universal oil) at many major oil distributors. But unless you really understand the API rating system (Who does?) you will never know that the CK-4 rated oil will have phos within the range of 0.1% and 0.12%, while the CK-4/SN oils will have a phos level of 0.08% (or less). None of these oil containers provided any clue to this great difference. In addition, a quick check at my local oil container store shows that there are several times more CK-4/SN 10W-30 oil offerings than for the the CK-4 10W-30 type.

Obviously, this is what the Ford motor Company was critical of.
What in the world was the API thinking?

Richard1 please comment.

Bob Helt

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Re: diesel oils for the Corvair. Richard1 please comment
Posted by: Vairismo ()
Date: February 09, 2018 07:12PM

Less than 1/2% difference. I don't know much, but that doesn't sound like a huge deal either way.

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Re: diesel oils for the Corvair. Richard1 please comment
Posted by: joelsplace ()
Date: February 09, 2018 07:48PM

Check your math. The numbers show a 25-50% more in the plain CK4.

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Re: diesel oils for the Corvair. Richard1 please comment
Posted by: vairmech ()
Date: February 10, 2018 05:06AM

If you do a search Richard1 has already commented on this and explained which letters work best with our Corvairs.

If memory serves me correct he was talking about the CI-4, CI-4+ and CJ-4 oils and no mention of the CK oils.

Here is the post, Richard1 Oil Selection

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: diesel oils for the Corvair. Richard1 please comment
Date: February 10, 2018 07:49AM

From the Petroleum Quality Institute:




Also, according to HDT Ford recently has approved the Shell Rotella T5 CK-4 10W-30 as meeting their newest spec for the newest SD Ford Diesel trucks


Dan Davis ~ Pierce County, WA ~ CORSA Western Director + Corvairs NW + North Cascades Corvairs + Corvanatics
1966 Corsa Turbo coupe ~ ~ 1966 140 Corsa ~ ~ 1965 Monza 140/4 'Vert Sierra Tan/Fawn ~ 1964 Monza 'Vert (SOLD) ~ 1960 Monza Ermine White/Red PG ++ ~ 1965 Monza 140/4 Evening Orchid w/ ivory/black interior ~ 1962 Monza Wagon 102/4 ~ 1963 Rampside/Scamper ~ 1963 Red/Greenbrier ~ 1969 Ultra Van #468

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Re: diesel oils for the Corvair. Richard1 please comment
Posted by: richard1 ()
Date: February 10, 2018 08:48AM


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Re: diesel oils for the Corvair. Richard1 please comment
Posted by: vairchet ()
Date: February 10, 2018 10:53AM

This is what I've been using for a few years now without adverse effects:

[www.zoro.com]

Here's information that could be of some use:

[www.naftosindonesia.com]

Chet in Ramona

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Re: diesel oils for the Corvair. Richard1 please comment
Posted by: john.jackson ()
Date: February 10, 2018 03:24PM

I have zero doubt that improved motor oils have greatly contributed to much longer engine life over the last near 50 years since the 1969 Corvair was new.
Using the top grade 10-30 oils and changing oil at 3000 mile interval's I got 145k miles after 16 years on my then factory new 1969 Monza. And it was a head gasket failure that made me abandon the Corvair. Not an oil failure issue.
So what am I saying?
Most, like 99.44 per cent of us will never drive our current Corvair's another 100K miles.
Simply use a good oil and change it regularly. That should be a whole lot better than the premium oils I used in 1969.

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Re: diesel oils for the Corvair. Richard1 please comment
Posted by: Melb-Mike ()
Date: February 12, 2018 03:59PM

I read the article in last Month's Corsa magazine(maybe even earlier) on the lengthy test performed on engine oils by an engineer. If I remember correctly, Castrol Oil was top rated and not too far back was Mobil 1 5W-30 synthetic oil. Since two of my modern cars call for Mobil 1, I decided to just use Mobil 1 5W-30 on all cars. My 65 Corsa with previous lifter tapping noise grew quiet within 15 minutes. The 66 Corsa seemed to run a bit more responsive. Life is much simpler when I only need one oil on the shelf. Hardly a long term test however.

64 Greenbrier
64 Spyder (needs restoration)
65 Corsa 140, restored
66 Corsa turbo, restoring now
66 Corsa 140 "RR" code coupe fully restored
67 Pontiac GTO restored
69 Corvette 427 convertible restored
2004 Caterham R400 (Lotus super7)my race car
2015 Porsche Panamera S
2015 Corvette Z06
1965 AC Cobra (Factory Five)

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Re: diesel oils for the Corvair. Richard1 please comment
Posted by: 66vairman ()
Date: February 12, 2018 04:19PM

john.jackson Wrote:
-------------------------------------------------------
> I have zero doubt that improved motor oils have
> greatly contributed to much longer engine life
> over the last near 50 years since the 1969 Corvair
> was new.
> Using the top grade 10-30 oils and changing oil at
> 3000 mile interval's I got 145k miles after 16
> years on my then factory new 1969 Monza. And it
> was a head gasket failure that made me abandon the
> Corvair. Not an oil failure issue.
> So what am I saying?
> Most, like 99.44 per cent of us will never drive
> our current Corvair's another 100K miles.
> Simply use a good oil and change it regularly.
> That should be a whole lot better than the premium
> oils I used in 1969.

I agree - considering the low miles I put on my Corvair changing oil between 1,000 to 2,000 miles is no hardship. Modern 10W30 oils with low ZDDP work fine if the mileage between oil changes is not overextended. In the last two decades NOBODY in our club used the diesel motor oils, just name brand low ZDDP 10W30 and NOT ONE cam shaft failure!!

Will the ZDDP issue every go away??

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