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:
This archive was generated by hypermail 2b29 : Sun Mar 02 2008 - 02:10:10 EST