You shouldn't be running 15w50 in that engine anyway. 10w30 is the
"recommended" for that year/model. Running a 5w30 will help with the
mileage a little bit and doesn't hurt the engine one bit. The oil tests are
nice but they're not something that you want to rely on.
- Bernd
-----Original Message-----
From: Barry Oliver [mailto:barrysuperhawk@insightbb.com]
Sent: Sunday, February 10, 2008 11:04 PM
To: dakota-truck@dakota-truck.net
Subject: Re: DML: RE: ...Mileage...and oil
Are you trying to tell me my 99 with a 318 that was designed sometime
before dirt was invented shouldn't run 15w50? Hmmm. Well, I have
almost 100k worth of oil analysis that says my engine is just fine...
Just to be clear, I am running Mobil 1 15w50 synthetic [so called] oil.
I am NOT running 15w40 or 20w50 DINOSAUR oil in anything.
Bernd D. Ratsch wrote:
> The newer oils used in these engines come from the engineers designing the
> engines. .006" bearing clearances aren't something you want to be using
> 15w40 (let alone 20w50) in.
>
> - Bernd
>
> -----Original Message-----
> From: Barry Oliver [mailto:barrysuperhawk@insightbb.com]
> Sent: Sunday, February 10, 2008 8:03 PM
> To: dakota-truck@dakota-truck.net
> Subject: Re: DML: RE: ...Mileage...and oil
>
>
> 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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