YOUR favorite OIL????

Big R had Mobil Delvac for $59.99 for the 5 gal bucket, then Mobil had a rebate going of $25 per, limit two per household. After adding tax & rebate back, it gets 10 gallon down to about $80.

 

Its to a point for me where my time is more available then being under the truck to save a few cents for me doing my own oil service and lube. I still get under to lube it between oil changes, But for an average of spending $200.00, your choice of quality oils, (premuim filters extra), there is no comparison. I did the math, and its in my favor. Just my .02

 

Why Synthetic oil, from: http://en.m.wikipedia.org/wiki/Synthetic_oil
"Advantages
The technical advantages of synthetic motor oils include:

Better low- and high-temperature viscosity performance at service temperature extremes
Better (higher) Viscosity Index (VI)
Better chemical and shear stability
Decreased evaporative loss
Resistance to oxidation, thermal breakdown, and oil sludge problems
Possibility to extended drain intervals, with the environmental benefit of less used oil waste generated
Improved fuel economy in certain engine configurations
Better lubrication during extreme cold weather starts
Possibly a longer engine life
Superior protection against "ash" and other deposit formation in engine hot spots (in particular in turbochargers and superchargers) for less oil burnoff and reduced chances of damaging oil passageway clogging.
Increased horsepower and torque due to less initial drag on engine
Improved Fuel Economy (FE) - from 1.8% to up to 5% has been documented in fleet tests[unreliable source?]
Disadvantages
The disadvantages of synthetic motor oils include:

Substantially more expensive (per volume) than mineral oils.
Potential decomposition problems in certain chemical environments (predominantly in industrial use.)

 

you know wiki sometimes not accurate.

 

In discussion with my Schaeffer oil rep. Did some research on Detroit 60 at Detroit's site, along with seeing several articles showing 10w30 oils being approved for all engines by Detroit as long as they meet the 93K218 standard, I am giving some thought on putting in a Schaeffer #711 10w30 syn blend after the next oil change to see how things look. Since it is a low mile engine and has virtually no oil consumption, figured it might be a good test situation. Of course, oil samples will be done.

Did a lot of digging thru Detroit lube manuals, and there is no issue with using 10w30, year round, in all the Detroit engine lineup from Series 40 thru DD15 as long as the 93K218 spec is met. Will be interesting to see if there is any mpg improvement and what the wear numbers look like and how the oil holds up.

 

I think you are giving oil subject too much thought and research when its straight forward. Why would you go down to a 10w30? What if it can cost you your engine just cause you wanted to experiment some theory of yours. Its thinner than what everyone uses regularly. If you gonna experiment use different brand oils but don't change weight so drastically. My opinion

 

Amsoil all the way. My Detroit has a small oil leak go figure right. Amsoil no leaking untill 20,000 miles rotella starts leaking at 8000.

 

Used on 1999 s60 detroit rotella 15w-40 up to 1.480.000 ms
At that point i installed the OPS filter and started using T6 5w-40 up to 1.560.000 when i sold it...

That was a good reliable engine, nothing was changed inside it ....

Back to oils....now am using T5 10w-30 on this 2014 isx...

 

I don't side with that. Since Detroit approves use of 10w30 oil that meets the 93K218 spec on every line haul engine from the pre-egr Series 40 thru the current DD15, and they allow a 50% extension of the oil change interval as well if the oil meets the 93K218 spec (yes, even on a pre-egr Series 60 like I have), I don't really think it is an "experiment" except on seeing how fuel economy is affected. Detroit is even factory filling engines now with 10w30!

So many, including me to be honest, have been conditioned for so long on the 40w oils, it seems silly to "go down" in grade. That has led to people wanting to dump 150w gear oil (basically that is what Lucas OS is) in their engines. The idea that thicker is better. Well, it is shown that lighter oils shed heat faster than thicker oils among other advantages. I have read a lot of technical articles recently on using 30w oils in diesels, and it is just now starting to sink in. There may be no real fuel economy improvement that makes it worth while, but the better cold starting properties, faster flow to critical engine parts, and better heat dissipation sure doesn't seem like a bad idea. Does it to you?

 

Well I'm no expert on oil additives but to my understanding lucas does more than thicken your oil. Lucas has additives that your oil doesn't contain that bond to internals of the engine and reduce wear and extend life of your engine. Well thats what they say right. I use mystik oil 15w50 and mystik viscidlube oil treatment sometimes. Just had an infame done to N14 Cummins in February and my oil pressure was at 15psi at idle with warmed up engine and 35psi at 1200rpm or over. After 6700 miles i noticed oil pressure dropped to 13psi/ 31psi, so i decided to add a gallon of viscidlube and the oil pressure went back up to normal all throughout 10633 miles to when i did the oil change. So with that info think of how much viscosity a 10w30 oil will loose compared to a 15w50 after several thousand miles?
I hope my example gave you some helpful info.