Well.
My truck is a 99, not an 09.
M1 15w50 isn't really that thick, it's not like straight 50 wt...
Many of the newer oil specifications come directly from the need to pass
emmissions, and lower viscosity oils do help that.
I send my oil in for analysis with EVERY oil change. I have even
duplicated samples to different companies as a "check" and have found
that IMHO blackstone is both the most consistent and the most
knowledgeable. My choices in oil come directly from that research.
When I run 10w30/40 in the summer, I get more wear indications, just
like when I run 15w50 during the summer. The 5w40 *might* be a
compromise as it seems to be a higher quality oil than the 10w30/40. I
will get back to you on that.
I have tested my mileage in controlled situations, I make the same
drives repeatedly throuought the year, and I keep track of them. I
dislike tracking my in-town mileage because it is depressing, but if you
want the 110 mile stretch between Joliet and Bloomington or or the 180
mile stretch from Springfield to Indy, or the 85 mile stretch between
Springfield and STL, I have GOBS of data points that I averaged and
casually presented here. When I track my "runs" I note weather, temp,
traffic, speed, loading, tire pressure and driving style.
You think Andy was anal when he showed his spreadsheet? Please. I am
so anal about my truck I refuse to show even the DML the extent of it
for fear of ridicule. Example, I have driven the truck 102k miles since
I bought it, and I have gone through 14 valve stem caps, 6 rubber and 8
metal. Of those, 5 of the metal were lost during a tire replacement,
and 2 were lost due to operator [me] error. Only one was lost
legitimately on the road, and it came off my spare after approxamately
3000 miles. OTOH, all six of the rubber caps was lost on the road.
Bernd D. Ratsch wrote:
> Ok....the old school oils are no longer recommended in these modern engines
> (at all). Main reason: bearing tolerances are down to .006" and oil quality
> (and viscosity) is critical. Use too thick of an oil and you can cause
> premature bearing damage. Using a thicker oil in the summer and a thinner
> oil in the winter used to be the norm - but not anymore.
>
> Mileage tests also need to be in a more controlled situation - comparing
> winter to summer mileage while using different oils isn't just
> weather/temperature dependent...too many variables to say that one oil is
> better than the other.
>
> - Bernd
>
> -----Original Message-----
> From: Barry Oliver [mailto:barrysuperhawk@insightbb.com]
> Sent: Sunday, February 10, 2008 12:45 AM
> To: dakota-truck@dakota-truck.net
> Subject: DML: ...Mileage...and oil
>
>
> 99; 318; 4x4; 130k; 13" WIDE BFG Mud tires; 75 mph highway cruise.
>
> with 15w50 oil in the summer average 17 mpg [5-8k on oil tests ok]
> with 10w30 oil in winter average 15 mpg [3-5k and oil is shot]
> With 5w40 oil in the winter, average 16.4 mpg [small sample, good for
> 5-6k miles]
>
> I intend to run more of the Shell Rotella 5w40, as it tests as good or
> better that the Mobil one, if a little less longevity.
>
> Mobil 1 10w30/40 Good for 3-5k miles before being totally used up,
> depending on driving.
> Mobil 1 15w50 Good for 5-8k miles and still has reasonable life left.
> Shell Rotella 5w40 Good for 5-6k miles, only tested twice, but it fits
> solidly between the 10w30/40 and the 15w50. Depending on how it tests
> in the warm, I may switch to this altogeather because the thinner oil
> seems to quicken throttle response just a tad.
>
> Side note, The benz runs 10k on 0w40 and seems to test ok, but I have
> only sampled at 5k [no change] and just now at 10k [test not back yet]
>
>
>
>
> Bernd D. Ratsch wrote:
>
>>Why not just run 5w20 or 5w30 Mobil-1....it isn't going to hurt anything
>
> and
>
>>helps out in the cold weather.
>>
>>- Bernd
>>
>>-----Original Message-----
>>From: "Digger" [mailto:dodgedakotaquadcab@yahoo.com]
>>Sent: Saturday, February 09, 2008 2:12 PM
>>To: dakota-truck@dakota-truck.net
>>Subject: Re: DML: is this the end of the Dakota?...Mileage
>>
>>
>>Ok Boys:
>>
>>00' Dakota Quad Cab 4x4
>>126,000 miles
>>
>>If weather is 45F or above,Hwy mpg is between 20.9-22.1(65-70 mpg)
>>
>>and thats with Mobil 1 10w30
>>--- Andy Levy <andy.levy@gmail.com> wrote:
>
>
>
>
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