best choice for oil

[peanutman]

Whats the best weight and brand of oil to run in our bumps. My manual says for texas climate 10/30 but my truck has 140,000 miles. They are making high milage oils now what about those. Been running motercraft 10/30 but guy at az said you can't get it anymore.
Motor craft has changed to a synthetic blend and all iv'e been able to find is 5/20 and 10/40.

[convincor]

I use 15/40 Rotela-T in everything. It's about the only oil left that still has zinc in it.

[The_Eman]

I use 15/40 Rotela-T in everything. It's about the only oil left that still has zinc in it.

Interesting.

I have to say Mobile 1 full synthetic but what do I know.

[Kurt Combs]

I have no problem finding 10-30 in northern Cali, which is what I am running now. After convincor mentioned the zinc issue I will probably switch to 15/40 Rotela-T. My recollection is that the zinc if for the flat tappet cam lobes?

[AlleyCat]

Another vote for 15/40 Rotella T.

[aramil]

what does zinc do? i have used valvoline before, but my bump is ready for a oil change, do i need oil with zinc in it?

[AlleyCat]

The zinc is part of the anti wear additives that are blended with the oil.It's primary purpose is prolonging lifter and cam lobe life.

[peanutman]

15/40 weight is ok to use w/ high mileage motors. Where do you get rotella. I run mobile 1 in the wifes care. I think its the best you can buy, but i need to run several short oil changes and that would get expensive. Also this truck set up a while and there was some rust in the valve covers probably from sweating. Is there an oil or additive to help prevent that.

I have heard that the 302 is bad about engine condensation if you make short trips and then it sits like a weekend driver as mine.

[convincor]

do a search in the FE forums or places like Club Cobra's FE section.
Rotela's real popular especially for use with solid flat tappet cams.
For like said above, cam lube
Some will use other oil but add a zinc additive.
Mobile1 I like, ran it in a 502 roller motor I had in my boat. But for the FE's I'll stick with Rotela.

[peanutman]

My dad runs rotella in his f250 diesel. He swears by it. I figured it was mainly for diesel engines.

[rubiranch]

I use Valvoline 10w30 Durablend.

I did use Motorcraft 15w40 diesel oil (for the zinc) while breaking in the cam but I am going to change it back to the 10w30 Durablend.

[AlleyCat]

15/40 weight is ok to use w/ high mileage motors. Where do you get rotella. Also this truck set up a while and there was some rust in the valve covers probably from sweating. Is there an oil or additive to help prevent that.

I have heard that the 302 is bad about engine condensation if you make short trips and then it sits like a weekend driver as mine.

Rotella T is also available in 10w/30 and single grades. I don't know of any additives that would help with the condensation problem but I'd suggest when you do drive it try to run for an hour or so.This should get it warm enough to boil the condensation off and burn it thru the PCV system.

[peanutman]

Yea i need to check the PCV system most of the rust was on the PVC valve side. Could have a stopped up valve or hose.

[BobbyFord]

I run Valvoline ZR1 Racing oil for the high zinc content.

[convincor]

Here's a link for comparison. The Valvoline is the highest.
http://mcgeerf.tripod.com/americansynth ... /id17.html