quote:It's not the $6, it's the consumption. If an engine is oiltight with one type of oil I won't use an oil in it that doesn't have the same characteristics. Oil consumption tells me I'll end up with carbon deposits and sicky rings in the long term. Not a good thing...
Originally posted by buster: If it turns out that M1 R is consumed like M1 SS, I'd really start to loose respect for M1. Who would pay $6 + qt for an oil that burns off so easily?
quote:Thats good to know. It does depend on the car most of the time. Guy at work runs M1 0w-30 in his Accord to 8k miles with no oil usage either. Some cars have a tendency to burn more then others for some reason. I had trouble with Redline 5w-30. Could be the esters or other chemistry. RL NOAK is 5%!
Out of the four cars I've had over several years I've had no oil usages between changes at all. Not sure why so many are reporting that.........
quote:It is common sense, isn't it? I've always believed in matching an oil viscosity to the ambient temps. Indeed, for HD diesel motors, the specifications may require 3-4 different grades depending on at what extreme you operate at. How about "the good 'ole days" when we had to use SAE 10W with 10% kerosene? I must admit, the motor was squeaky-clean by next spring, though the oil filters would plug every 2,500 miles. I don't bash "thin" oil and indeed I was one of the first in my area to switch to "thin" oils for winter. I just wanted the d*** thing to start at -42. That was back in 1980 when I used Esso XD-3 0W-30 "Arctic" HDEO in my 1980 Toyota pickup. Much improved cold starts, especially colder than -30. In summer, I ran Esso XD-3 15W-40 in the motor, same grade I used in my HD equipment. For a long time I was a big fan of Mobil Delvac 1, as it appeared to be a truly "universal" oil. With the CI-4 reformulation, the oil appears to be quite a bit thicker, especially in temps colder than -35. There aren't too many places on the planet where in winter one can experience -42, and in summer +35 C. So I still end up changing my oil twice a year. Since joining this forum, I've seen a lot of posts from Widman in Bolivia, and our friends in Oz, who report that oil grade recommendations are FAR different than here in North America. I've always been leery of the API/SAE "Starburst" recommendations as they are truly lame. My goodness, the oil can thicken +275% and still "pass" the test? As an example, Ford and Honda only appear to recommend xW-20 oils in North America, where in the rest of the world they recommend up to 15W-50/20W-50 oils. Thanks to CAFE, they can apply the theoretical 0.01 MPG "improvement" fleet-wide and earn CAFE "credits." I don't think using a dramatically thicker OR thinner viscosity for 1-2 OCI's will hurt a mechanically sound motor. I'm more concerned about +10 years. Since motor clearances really haven't changed much in 30 years, and since the same exact motor carries a 20W-50 recommendation in Oz (The fellow with the 2001 Camry), I feel quite safe running a non-Starburst oil in summer. I'm still surprised that most Vortec truck owners are afraid to play with thinner viscosity grades in winter (To avoid the dreaded "cold start knock") and with thicker viscosity grades in summer (To minimise oil consumption). In April when I change out my Mobil 1 0W-30, it should have around 8,900km on it. Will do the UOA and see what the results are. Running the 15W-50, will see what the results are when it gets changed out in Oct or Nov. FWIW I was traveling yesterday and stopped in at a Wally World. They carry the Castrol Syntec 0W-30, sez "Made in Germany." The bottle also stated "unassisted starts to -40." I guess colder than -40 you had better use something thinner? Jerry
Originally posted by JohnBrowning: heyjay, I want to congratulate you on being brave enough to try something thicker then 5W30! It also relives me to see that you use your common sense to decide what oil to use based on ambient temps!!! Good for you!!! I have been on a one man mission to free the thin oil people from their oil ring genicide but it is a hard fight!
quote:Our local school board took part in a Mobil field trial running Delvac 1 in a variety of gas and diesel bus motors. This was in 1978. I can't recall what the viscosity was, though the results were excellent. When I first started using Delvac 1 in 1984, it was a 5W-40. It appeared to work well in cold temps, perhaps a bit thicker than Esso XD-3 "Arctic" 0W-30 at -40. The new CI-4 rated Delvac 1 is quite a bit thicker at low temps. It's no longer a good oil at -40. Jerry
Originally posted by pmt: Something the youngsters here probably aren't aware of, back when I first started using Mobil Delvac 1 in the late 70s, early 80s - Delvac 1 was a 5W-30 oil. And it was a very good extreme cold oil. My 70 Impala sat outside at work for two days one time when I was on a trip. Daytime highs were running at about -20 F! When I got into the car at about 7:00 PM the second day, the actual air temperature was -25 F. Fired right off with no unusual engine noises. Just the usual grunts and groans a very cold engine makes when first started.