20w-50 oil

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20w-50 oil

Post  txpower_ram on Sat Dec 05, 2009 10:55 am

Ive been using 20w-50 in my small nissan for the past 5 years because I was told it was a good for Texas because Its an heavier oil and it doesnt get as cold down here. What do yall use?
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Re: 20w-50 oil

Post  dwc43 on Mon Dec 07, 2009 2:01 am

Depends on the car. The newer ones have smaller oil passages. One fault of the 2.7 that usually destroys it. I use 10w30 in them. The 5w30 listed in the book it too thin even for them. 2.2 Old LA and big block stuff, 10w30 or 10w40 if you work it a little harder. 20w50 is too heavy for your stock engine. If you was racing with loose clearances, then yeah, but it's too much for your stock stuff. Very Happy

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Re: 20w-50 oil

Post  txpower_ram on Tue Dec 08, 2009 5:49 pm

my 93 nissan is my work truck, Ill use 10w-40 then. It doesnt like the 10w-30. I can tell the difference.
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Re: 20w-50 oil

Post  dwc43 on Thu Dec 17, 2009 3:48 am

I'd stay away from Castrol as well. I used it for a while in my tow truck and race car when we first started dirt track racing. I was tearing up engines on a regular basis. Then I figured it out. I changed the oil in the tow truck ever 3000 and I used the same 20w50 in the race car and tow truck. I got to noticing that around 1400 to 1800 miles on the fresh oil in the tow truck that the oil pressure would drop in half. I'd change the oil at 3000 and the oil pressure would return to normal till I hit that millage again. The oil was breaking down and it was ruining the bearings in our race car engines too. Local stores started carrying my old oil brand in 20w50 so I switched back and never had a problem since.

Also, oil these days has no zinc in it. So if your breaking in a new engine or just a new cam and lifters, especially if it's a solid lift cam, better add a zinc additive to it. You can also use a 15w40 or 15w50 diesel truck oil for break in too. It still has some zinc in it, but not a lot. I'd still add the additive to it. Very Happy

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