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kstevusa
kelly stevenson
Southern Middle Tennessee
(943 posts)

Registered:
10/25/2007 09:37AM

Main British Car:
2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT / 6sp. AT

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Oil Viscosity ?
Posted by: kstevusa
Date: September 04, 2009 02:38PM

I just change the oil in my Old 1995 chev. truck. I had 2 qts of 20-50W & 2 qts of 10-30w. Mixed both of them together in the crankcase, What nominal weight oil do I now have? 15-40W? I always wondered how the different viscosities mixed. Any answers? Just couldn't dispose of the 20-50w. w/o using it. Leftover from the 4 cyl.


kstevusa
kelly stevenson
Southern Middle Tennessee
(943 posts)

Registered:
10/25/2007 09:37AM

Main British Car:
2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT / 6sp. AT

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Re: Oil Viscosity ?
Posted by: kstevusa
Date: September 07, 2009 10:11AM

WHOW! Less than overwhelmed by the response of our knowledgeable ? members. any ideas?
SAFETY FASTER!


Dan B
Dan Blackwood
South Charleston, WV
(973 posts)

Registered:
11/06/2007 01:55PM

Main British Car:
1966 TR4A, 1980 TR7 Multiport EFI MegaSquirt on the TR4A. Lexus V8 pl

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Re: Oil Viscosity ?
Posted by: Dan B
Date: September 07, 2009 12:08PM

Hi Kelly,

I did an internet search on mixing viscosity and there are a lot of different opinions. I didn't find anything definite, but maybe you can with a little time spent.

Dan B


kstevusa
kelly stevenson
Southern Middle Tennessee
(943 posts)

Registered:
10/25/2007 09:37AM

Main British Car:
2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT / 6sp. AT

authors avatar
Re: Oil Viscosity ?
Posted by: kstevusa
Date: September 07, 2009 02:20PM

Thanks for reply and interest Dan. The Pub looked to be down on posts and I thought maybe this would generate some traffic. I suspect the final product is a mixture of the properties of 2 viscosities. the final results are not a major concern since they are all ready completed. Appears the oil pressure is up a little when cold, but drops to normal under operating conditions. this seems to indicated the oil this thicker at first than the 5-30W. used earlier, but not up to the 20-50W .
Thanks and have a great day!


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1112 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

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Re: Oil Viscosity ?
Posted by: ex-tyke
Date: September 07, 2009 05:40PM

I've heard that oil can be thinned with a couple of tablespoons of Dickle.......however, the final concoction has explosive qualities, so should not be used regularly in an FoMoCo engine.
Hope it gets you safely to Pete's this weekend.


kstevusa
kelly stevenson
Southern Middle Tennessee
(943 posts)

Registered:
10/25/2007 09:37AM

Main British Car:
2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT / 6sp. AT

authors avatar
Re: Oil Viscosity ?
Posted by: kstevusa
Date: September 07, 2009 06:21PM

Thanks for well wishes. Have a safe trip to The Glen. Dickel has lubricating quality, but does not mix too well with petroleum. It makes the tongue loose, but the tale tight. Plan to carry 2 fresh watermelons pick this AM. may plug them and add PGA. Should be a whale of a GOOD TIME!


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