kyle_22r

...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...

roger

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

jimbo74

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

BT17R

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

kyle_22r

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...

SD70MAC

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.

kyle_22r

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

3car

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.

waskillywabbit

iTrader: (-1)

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....

myexcaliber2000

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.

wrenchmonster

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

wrenchmonster

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

jimbo74

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?

kyle_22r

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.