Okay, I must have been misusing the term viscosity. Hope y'all still got the jist of my message.
Brian On 10/1/06, Peter Frederick <[EMAIL PROTECTED]> wrote:
The point is that it DOESN'T change viscosity! Peter On Oct 1, 2006, at 12:55 AM, Zoltan Finks wrote: > I'm not disturbed by that at all, in fact I love it. > > How can we be certain though that the oil will behave that way? > > Bear with me, I never took chemistry. But when the my engine's health > is in > the balance, this chemical wonder that is an oil switching viscosities > based > on temperature has long made me wonder. I'm not being a smartass, I'm > asking. Is it 100% reliable that my oil will know when to be zero > weight and > know when to be forty weight, and that it will never screw up? > > If it is indeed foolproof, then it is only logical to run the 0W-40, > as this > will let the engine turn more freely at very cold temps. and may even > increase fuel economy? > > Brian > 83 240D > And here I said I wasn't starting an oil thread > > On 10/1/06, Gary Hurst <[EMAIL PROTECTED]> wrote: >> >> it's a 40 weight oil when cold that become a zero weight oil when >> cold? >> >> do you see something disturbing about this logic? >> >> >> On 9/30/06, OK Don <[EMAIL PROTECTED]> wrote: >>> >>> I, too, had shared this concern, until I read somewhere that the >>> higher number is the "real" viscosity, and the lower number is how >>> the >>> oil reacts in cold temperatures. That is, a 0W40 oil is a 40 wt. oil, >>> that maintains a viscosity similar to a 0 wt. oil at 0 degrees C., or >>> something like that -- it doesn't get as "thick" as a 40 wt. oil >>> would >>> at that temp., it's as "thick" as a 0 wt. oil would be at that temp. >>> >>> Please correct if I'm wrong --- >>> >>> On 9/30/06, Peter Frederick <[EMAIL PROTECTED]> wrote: >>>> 0 weight oils are too thin, in my humble opinion, for any diesel. >>>> Too >>>> much pressure on the journal on the compression stroke, not enough >> film >>>> strength, even for a synthetic like Mobil 1 >>>> >>>> The difference between dino and synthetics is huge, the difference >>>> in >>>> cold viscosity of synthetics is fairly small. >>>> >>>> I believe the 0 weight oils are intended to give small gasoline >> engines >>>> a bit better milage from lower oil pump resistance, not something >>>> I'd >>>> like to try in a diesel! >>>> >>>> Just my opinion. I tend to use 5W40 or 5W50 Truck and SUV or 15W50 >>>> Mobil 1 in the summer and 5W40 in the winter, but if I need to >>>> change >>>> the oil and can only find 15W50 in the winter, I use it. >>>> >>>> Hard starts are usually not helped by lower viscosity oil unless you >>>> have fairly high viscosity dino in the crankcase -- I've seen an >> engine >>>> that simple would not crank at all in the winter with 50 wt in >>>> there >>>> to hide a bad bearing.... >>>> >>>> Peter >>>> >>> >>> -- >>> OK Don, KD5NRO >>> Norman, OK >>> "The Americans will always do the right thing... after they've >>> exhausted all the alternatives." >>> Sir Winston Churchill >>> '90 300D, '87 300SDL, '81 240D, '78 450SLC, '97 Ply Grand Voyager >>> >>> _______________________________________ >>> http://www.okiebenz.com >>> For new parts see official list sponsor: http://www.buymbparts.com/ >>> For used parts email [EMAIL PROTECTED] >>> >>> To Unsubscribe or change delivery options go to: >>> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> _______________________________________ >> http://www.okiebenz.com >> For new parts see official list sponsor: http://www.buymbparts.com/ >> For used parts email [EMAIL PROTECTED] >> >> To Unsubscribe or change delivery options go to: >> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
