Mobile delvac or Lucas

[jake88]

The EMA, oil companies and regulators are basically all on board that the viscosity under high temp-high shear (HTHS) is inversely correlated with fuel economy.

Right now I know that Cummins has approved oils with as low as 3.5HTHS and have seen field data and fuel trial data for some of those oils. Something like 2 - 4% FE increase is possible. More like 2% for an all highway vehicle. If I was paying my own fuel bills for a trucking operation, I would go for the new fuel-efficient 5w30 heavy-duty engine oils. Look for one meeting Cummins 20081

Adding Lucas can't do anything good for high-quality oil - excessively thickening the oil accelerates cold-start wear and increases drag on the engine.

 

[2hellandback]

Originally Posted By: TiredTrucker
A tenth or two might be seen, but it would be inconclusive that the oil was the benefit. Since the driver himself is almost 30% the variable in a truck getting or losing mpg, there can be a placebo effect in play. If one does something, like oil type change, to gain mpg, they might actually drive a little better to prove the point, albeit even if they are not aware they are doing so, and the better driving is what got the mpg than the the oil type change.


For me this might not apply since I use my cruise control all the time...

 

[2hellandback]

I have decided to try synthetic oil and it will be Pennzoil since they say there's is the BEST !!!!!!!!!!!!!!!

LOL

 

[2hellandback]

Originally Posted By: jake88
The EMA, oil companies and regulators are basically all on board that the viscosity under high temp-high shear (HTHS) is inversely correlated with fuel economy.

Right now I know that Cummins has approved oils with as low as 3.5HTHS and have seen field data and fuel trial data for some of those oils. Something like 2 - 4% FE increase is possible. More like 2% for an all highway vehicle. If I was paying my own fuel bills for a trucking operation, I would go for the new fuel-efficient 5w30 heavy-duty engine oils. Look for one meeting Cummins 20081

Adding Lucas can't do anything good for high-quality oil - excessively thickening the oil accelerates cold-start wear and increases drag on the engine.

It was only one gallon Lucas to what 13 gallons oil!!!!! not enough to make that happen... but since everyone thinks lucas is a joke here and I have faith in this forum...I will discontinue lucas and save $17.00 per oil change....

 

[TiredTrucker]

But, what would the benefit of using Lucas be? I just never got interested in the stuff, primarily because I could never get past the name... Lucas Oil Stabilizer. What is unstable about modern HDEO's that they need Forrest Lucas to come along and stabilize them? I realize that the LOS has a poor rep here, but I never could see dumping it in even before I found BITOG. Unless someone had an old, tired engine that needed a slightly thicker oil to nurse it along till it got rebuilt. To me, LOS is just a variation on the STP oil treatment stuff of the 60's and 70's.

 

[Clevy]

Originally Posted By: TiredTrucker
But, what would the benefit of using Lucas be? I just never got interested in the stuff, primarily because I could never get past the name... Lucas Oil Stabilizer. What is unstable about modern HDEO's that they need Forrest Lucas to come along and stabilize them? I realize that the LOS has a poor rep here, but I never could see dumping it in even before I found BITOG. Unless someone had an old, tired engine that needed a slightly thicker oil to nurse it along till it got rebuilt. To me, LOS is just a variation on the STP oil treatment stuff of the 60's and 70's.


I rarely agree with you tired trucker but this post I agree with 100%.
What about today's oils need to be stabilized?
What about them is unstable and how does the addition of this uber-thick substance stabilize it?

 

[Ken2]

The color of the oil doesn't mean much. I've run diesel oil that is a black as paint but still gets good lab analyses and no engine problems. A small amount of soot in the oil is expected and no problem, but it turns the oil black. Too much soot is a problem, and oil analysis finds out how much you actually have in the oil.

At the next oil change, get a sample analyzed. It will be money well spent. You might be able to safely extend your oil change mileage and save money. Or you might find a problem in the engine that can be repaired before the damage is catastrophic.

All the major brand oils are equally very good. Nothing wrong with Shell Rotella/Pennz/Mobil Delvac/Chevron Delo/Valvoline/ConocoPhillips76 or any of the rest, and nothing special about them. I think the Schaeffer might be both excellent and lowest cost per mile.

The benefit of Lucas stuff is clear...to the profits of Lucas Oil Products, Inc.

 

[TiredTrucker]

Yeah, Forrest Lucas has to pay for that name on the stadium in Indianapolis!

 

[2hellandback]

OK I just talked to rocky mountain cummins again,,and they are still saying 15-40 is the best oil I can run in the ISX engine..

 

[2hellandback]

avg for feb was 6.0 but that's running 35% miles empty loaded I woul;d say my avg woud be 5.3 or 5.4 mpg

 

[2hellandback]

Originally Posted By: Ramblejam
Originally Posted By: 2hellandback
Originally Posted By: Ramblejam
15,000 miles -- is this a vocational application?

this is an over the road truck 100% highway...


What's your average miles per gallon?

avg for feb was 6.0 but that's running 35% miles empty,,, loaded I would say my avg would be 5.3 or 5.4 mpg

 

[TiredTrucker]

Ouch! I average mid 6's in the winter and mid 7's in the summer on all miles. I only have an average of 7-8% empty and run a lot of bulk commodities, so my average gross is around 40K in the box. That's average payload. I get a lot of 46K loads also. I get a calm day and something like only 20-25K in the box, and i am sitting well into 8 mpg territory in the summer. Even the ISX I had before got high 6 / low 7 mpg averages.

Either way, I am very happy with the Schaeffer 7000 15w40 syn blend I am using. Very good cold weather performance and cheaper than most anything off the shelf. And delivered free to my house with free oil sample kits included!

 

[Amirkhat]

I think Mobil makes the best products, if for no other reason their budget for r&d (because they aero much larger) is much higher therefore making them more effective. That's my opinion.

It's always difficult to make a blanket statement though, the compatibility can may vary based on the vehicle and the change intervals.

Amir

 

[yvon_la]

stick close to recommended viscosity for said year of engine by engine maker!amzoil is probably one of the top brand if not the top one,that being said I doubt you would need it.best bet is to use an oil that meet both cj-4 and acea9 or better!as for fuel economy and oil?i doubt it will be noticeable!computer control engine ,so a lot of other variable come in play chief among them is idling (to keep cool or hot)