3K oil change intervals for our LR4s?

[Fuji4]

The Amsoil magazine has this article which may be of interest.

 

[gsxr]

That's interesting. A few years ago everyone was swearing by Mobil1 0W-40 for German cars. That's what I used on my 997TT and our Cooper S. I no longer have those cars but I'm still sitting on 5 quarts of it.

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.

 

[Quijote]

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.

 

[Fuji4]

Here is a good discussion on modern oil properties with a guy from api

 

[Fuji4]

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.

 

[Fuji4]

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.

 

[gsxr]

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!!
https://www.amsoil.com/p/signature-series-10w-30-synthetic-motor-oil-atm/

 

[Fuji4]

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.

 

[ttforcefed]

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

 

[gsxr]

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.