I am changing my oil at 15000 miles (total on truck), and about 4000 mi ahead of its schedule, because the cold weather is coming (flow). And because I want to get tranny changed and diffs done too, it will work out nice. Is it a proven fact that the Truck and SUV oil is just rebadged Delvac? They have this at my local Walmart but would have to mail order Delvac. I just want to make absolute certain! Thanks!

 

Check the back of the bottle or the Mobil website. You should see it there along with the required CI rating. If you want Delvac 1, I got some from a Farm & Fleet in Montgomery, IL. What oil change interval are you using? I thought 7500 miles was the severe duty schedule and you would be on change number 2.

 

All the information I've seen (including some posts from tribologists who have spoken with ExxonMobil's technical services group) indicates that Mobil I Truck and SUV is relabeled (for marketing purposes) Delvac I. Apparently Mobil is targeting Delvac I for the commercial market where the Delvac name is known and respected, but is relabeling it as Mobil I Truck and SUV for the consumer market to get mileage from the name recognition of Mobil I as a leading consumer market synthetic product. Most consumers have never heard of Delvac.

Rusty

 

I am on 7500 mile intervals, but dropped factory fill at 5000, second change with Dino Oil at 12,500, next scheduled change would be 19000. I am changing at 15000 so I am 4K ahead of schedule.

 

delvac1 = gallon containters or bigger
M1 truck&suv = quart containers...

 

Yes mobil 1 truck and suv IS delvac 1. I'm running it in my truck and it loves it. Great oil analysis results.

 

According to Mobil's website there are differences.

Delvac 1300:
http://www.mobil.com/USA-English/Lub...1300_Super.asp

Mobil 1 Truck & SUV:
http://www.mobil.com/USA-English/Lub..._SUV_5W-40.asp

Most of the spec stuff is way over my head but a few things stuck out.
Delac 1300 Super 15w-40(D):
Higher flash point - 230 C (226 C - M1)
Higher density - 0.879 (0.854 - M1)
Lower sulfated ash wt% - 1.3 (1.35 - M1)
(Below using ASTM D 445)
Higher viscosity @ 40 C - 123 (102 - M1)
Higher viscosity @ 100 C - 15.6 (14.8 - M1)

Mobil 1 Truck & SUV 5w-40 (M1):
Lower pour temp - -45 C (-30 C - D)
Higher viscosity index - 151 (133 - D)

What does this mean???
Delvac will withstand more heat (but your engine would have melted before this becomes a problem with either).
Delvac is a denser (by specifig gravity), denser at 40 and 100 degrees C (thicker anytway you test it - but this means it will provide better cushioning between your main bearings and crank, but will be harder to flow under pressure and won't flow as fast on it's own - but will theoretically lubricate better because of it's density)
Delvac has a lower sulfated ash content (Low-Ash Engine Oils are able to lubricate under conditions of continuous high load and high operating temperatures over long periods of time - That being said, lower is better, right???)
Mobil 1 Truck ans SUV has a higher viscosity index (The higher the better - Oils with low VI number such as VI=0 ("zero") have high dependence of viscosity change on temperature. They thicken quickly with decreasing temperature, and thin out quickly with increasing temperature. Oils with high VI number such as VI=200, will still thicken with decreasing temperature but not as rapidly, and also will thin out with increasing temperature, but again not as much as low VI oil.)

Conclusion:
Heck if I know. The Delvac seems better but the ~10% higher Viscosity Index of the Mobile 1 counteracts the the high temp density and higher specific gravity benefits of the Delvac - But we are comparing a 5w-40 to a 15w-40 - Of course the VI of the Mobile 1 would be higher - and also better for extreme cold starts (Like if you lived in Antartica) because of the VI and it's ability to pour freely down to -45 C, like you'd be doing an oil change at that temp...

Looks like I'll be buying the Delvac 1300 Super. I obviously have way too much time on my hands tonight but it was worth it!!!

Good luck with your choice!


Read here if you're interrested about the viscosity test:
http://www.astm.org/cgi-bin/SoftCart...store+hrzs6467
Then read here for specifics about automotive lubricating oils:
http://www.astm.org/cgi-bin/SoftCart...467+1098605796

 

Mobil 1 Truck & SUV 5W-40 is repackaged Delvac 1 5W-40, both are synthetic oils.

Delvac 1300 15W-40 is a dino oil.

 

Yeah Zilla, get with the program! Nobody was talking about d1300 dino. Also Zilla, the point of such a low pour point isn't so that you can do an oil change at -40, it's so the oil is still fluid when you try to start and run your engine at -40..

 

Sorry... Delvac 1 is the same as Truck & SUV Same properties, exactly.

I didn't see it when I went to Mobil's website the first time. I wasen't sure that is was a syn or not, never said in the prod disc.. Looking up all the meanings of the tests and other stuff I sure learned a lot though.

To correct myself, I'll be running Delvac 1. Then recycleing it in my fuel tank

One other question, what about that 0w-40 Mobile 1 Euro car formula? Cold starting properties look great...

 

That's -30 vs -45 degrees celcius, BTW. -49 vs -22 deg. F. I thought the conversion would be much lower, like -100 deg F. Glad you guys caught me and made me look!

Must stop thinking, pain too great, head splitting....aaahhhh....

 

so LIGHTMAN!!!

I take it the answer to the question why u running Mobil and not AMSOIL (as you use the AMSOIL filtering system - i know it is better then the mopar single fleetgard filter...)... is that it is a lot eaZier to get your hands on the Mobil vs. AMSOIL ???

yes, no, maybe...

 

synthetic lube oil does not burn near as well as dino oil... may make for a smokey ride

 

FastZilla, have you found Truck and SUV around us? I've not seen it, even at the big box stores.

I did drive up to Racine, WI to the PETRO stop to buy three gallons of Delvac1 for the next change.

 

stevenknapp, I found some at Murray's auto parts in Melrose Park.