...that the recommended all-around oil for a '79 pickup is 20w40? and i was wondering why my engine seemed so noisy after the rebuild!

15w40 diesel oil is good stuff...

 

Damn, that's not oil. That's molasses....

 

kyle, would running 15w-30 diesel oil be a good thing for the 22r? i was looking in the summit catalog and they sell Lucas Oil 15/40 High TBN Diesel TRuck Engine Oil... 4 - 1 gallon bottles for $34.95

 

Chevron Delo (Diesel Engine Lubricating Oil) has a solid rep, is available anywhere and costs about $1.50/qt. I use it during new engine break-in before switching to synthetic.

Chevron Delo

 

i wouldn't touch lucas oil...i've heard it foams up pretty badly. i think i paid $5.99 for a gallon of 15w40 at carquest

delo 400 is great oil, we run it in most of our rental equipment with more than 2 cylinders, everything from tractors to backhoes to our work trucks.

i've still got a little bit of mystery knock that's been there since i rebuilt the engine, so far it hasn't gotten louder so i think it may be a finicky valve...

 

Jeez, it was -5 this past Wednesday morning here. I'd love to see my engine try to pump 20w when its that cold! My owner's manual says to run 10w40 but I have been running 5w30 for about a month now and it seems to be able to start up easier on these blustery wyoming mornings. Before I leave here for good (5 weeks to go!!!!) I'll probably change it back to 10w40.

 

i've even had evil thoughts about hooking up a pre-oiler and running straight 30 or 40 weight oil...

 

a preoiler? it dosent matter, that oil will still be thick as tar until it warms up during the cold months up there. bad idea.

 

my ASE Toyota tech friend runs 20w50 in everything, he swears by it...he tried to get me to put it in my 22RE after the rebuild....but I'm going synthetic when I get to 3K miles....

 

i run 20-50 full synthetic in my supra. it does wonders for it. it hates all other oils but i put the castrol full synthetic 20 50 weight in there and it purrs like a kitten.

 

Here's a decent article. Basically you should always follow the manufacturers recommendations. There usually is a chart in your owners manual. Viscosity can change with temperature. Where I live it gets really cold in the winter and really hot in the summer. Hence I personally alternate between 5-30 and 10-30, using 5-30 in the winter.
http://www.blackstone-labs.com/oil_viscosity.html

 

Oh, I forgot to add. It's before my time, but I think 20-40 was one of the only multi-viscosity oils available in '79. Hence, Toyota may have not even had the choice to use say 10-30 or 5-30. Given the choice I wonder if their recommendations would be different.

Pay attention to what is said about using diesel oils in gas engines in the article folks.

-Wrench

 

so what exactly does this mean? : What makes an oil a diesel-use oil (rather than automotive-use) is the level of additives used. Diesels require heavier levels of dispersant and anti-wear additives. These heavier additive levels are objectionable for automotive engines since they may interfere with the emission controls mandated by the EPA.

how would more anti-wear stuff be bad for emissions?

 

not sure, but i know it works fine in a gas engine.

and fyi, a typical 30 weight oil has more actual oil and less polymer additive in it, for an example a dino 5w30 may only be acting as a 20w in your bearings...

with a pre-oiler you eliminate a lot of the dry running that running a straight grade oil since it's already being pumped through the engine before it's even started.