Discussion in 'LR4' started by jlach993, May 4, 2020.
The Amsoil magazine has this article which may be of interest.
And this goes back to "there is no one-size-fits-all" statement. Depends on the specific engine and lots of other variables. As a long-time Mercedes owner, I remember the discussion & debate when Mobil-1 0W-40 came out. Some engines had annoying hydraulic lifter ticking noises with that oil, which were cured by simply switching to a thicker version of M-1 (5W-40, 15W-50, etc).
On a vaguely related note, for the AMG M156/M159 V8's from 2007-2012 (approx.) Mercedes factory literature specifically stated that 5W-40 must be used, and 0W-40 was verboten. But for other German engines, the 0W-40 is fine. I don't use it in any of my 1990's vintage motors though.
Interesting. I'm fond of MB's and my first car (bought in 2000) was a 1990 190E 2.6. I recall using Mobil1 10W-30 on that for the 5 years I owned it. I'm tempted to pick up a nice R129 SL600.
Here is a good discussion on modern oil properties with a guy from api
And also here is a good explanation of the issues with direct injected engines. https://youtu.be/xrLNDgrIw3U
I suspect one of the reasons that LR insists on the weird Castrol edge is the volatility of subpar oils and how much blow by can affect a direct injected engines intake ports.
Of note in the savagegeese video he discusses the volatility increase of a 0w-20 vs a 5w-30 which might not be too much of an issue for a port or dual injected car but for our truck that might be a reason to stick with the 5w oil.
Got my black stone labs report back. Other than the oil type (which they typo’d or I wrote wrong by accident) everything looks great. The viscosity is thinner than the “should be values” because those are for 10w-30. this is a 13k + interval with heavy city driving and a blown supercharger in the middle of it. I’m pretty much fine to increase to 15k mile intervals which is amazing given my driving style.
That report does look very good. I still wouldn't want to go much beyond ~15k though.
Note that Amsoil Signature Series 10W-30 is top-of-the-line stuff, Group IV/V synthetic, specifically designed for extended drain intervals. Don't try this with cheap oil!!
This next year, i will cross the 15k mile barrier because ski season will ?happen? and ill log some long trips. Ill do another report in a year and see how it goes. It is what i expected, based on my knowledge of amsoil and watching other people on youtube, etc. But it is nice to get the actual results back.
It will work fine with Mobile1 also… The only way to get a really crappy report is to use non-synthetic oil and don’t change it for 15,000 miles...Are use them as oil for about 10 years and then switched back to mobile one… For daily driving you’ll never notice a difference
Not all synthetics are the same. For standard drain intervals, the difference doesn't matter. But when you are pushing to 15k or beyond, it does matter.
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