High Mileage oil ?

[adrianw]

Hi,

While I was pondering my use of Mobile 1 0w40 in my 125,000 mile 2002 Boxter S I stumbled across this:

https://mobiloil.com/en/motor-oils/mobil-1/mobil-1-high-mileage#10W-40#BVRRContainer

Then there is even a Super version:

https://mobiloil.com/en/motor-oils/mobil-super/mobil-super-high-mileage#10W-40

Anyone use it?

Cheers

Adrian

[husker boxster]

A high mileage oil may be OK, but you don't want to use either of the ones you've listed. The highest winter weight (the W figure) spec'd by Porsche is 5, not 10.

Regardless of what proper oil you use, lower miles between changes seems to influence engine health. It's est that 5-8K mi is the optimal interval between changes.

[adrianw]

They do provide other grades 0w20, 5w20, 5w30, 10w30.

I'm signed up tothe 5K oil change interval but using Mobile 1 0w40 here in the UK.

I've a very slight weep in the RMS area and it was suggested my choice of oil was too light and that something thicker might work I was pondering 5w40.

I see in the Bentley manual it suggests for:

more than 50F/10C it has 10w40, 15w40 & 15W50
less than 50F/10C it has 10w40, 10w30 & 5W30

That made me go hunting for the owners manual - This might be from a 2006 (did it change?)

[JackDidley]

I cant see the difference between 5 and 10 weight being a motor breaker. Ive been using 10/40 HM for about 30k miles changing at 5k intervals. I just went to 5/30 for the winter a couple weeks ago because I plan on changing in the spring.

[Brian in Tucson]

Now that we have that solved, what color windshield washer fluid do you use. I like the green stuff.

[BYprodriver]

Originally Posted by adrianw

Hi,

While I was pondering my use of Mobile 1 0w40 in my 125,000 mile 2002 Boxter S I stumbled across this:

https://mobiloil.com/en/motor-oils/mobil-1/mobil-1-high-mileage#10W-40#BVRRContainer

Then there is even a Super version:

https://mobiloil.com/en/motor-oils/mobil-super/mobil-super-high-mileage#10W-40

Anyone use it?

Cheers

Adrian

Mobil 1 used to be the best until the U.S. E.P.A. got involved, you should do some research to see if your country has the good stuff.

[lkchris]

Originally Posted by JackDidley

I cant see the difference between 5 and 10 weight being a motor breaker. Ive been using 10/40 HM for about 30k miles changing at 5k intervals. I just went to 5/30 for the winter a couple weeks ago because I plan on changing in the spring.

Well, I once checked the specs for Mobil 1 ... 0W, 5W, and 10W all had the exact same cold pour point (-55F)

The only significance of the W number is related to how the oil flows at a cold start ... after that (after warmup), it's meaningless.

In addition, because this is full synthetic, there is no need for a lower number oil for winter, as a warmed up motor is a warmed up motor, regardless of ambient temperature. With full synthetics, the only real significance of 30, 40, or 50 is engine clearances and engine friction. For an old aircooled engine, built with looser tolerances, 50 is good, new water cooled motors are being built to tighter and tighter clearances these days, so much so that xW-20 or even XW-16 oils are specified. What ever is specified is good year around for full synthetics. If you're using Porsche A40-spec oil (as you should) it's full synthetic.

[JackDidley]

Originally Posted by lkchris

Well, I once checked the specs for Mobil 1 ... 0W, 5W, and 10W all had the exact same cold pour point (-55F)

The only significance of the W number is related to how the oil flows at a cold start ... after that (after warmup), it's meaningless.

In addition, because this is full synthetic, there is no need for a lower number oil for winter, as a warmed up motor is a warmed up motor, regardless of ambient temperature. With full synthetics, the only real significance of 30, 40, or 50 is engine clearances and engine friction. For an old aircooled engine, built with looser tolerances, 50 is good, new water cooled motors are being built to tighter and tighter clearances these days, so much so that xW-20 or even XW-16 oils are specified. What ever is specified is good year around for full synthetics. If you're using Porsche A40-spec oil (as you should) it's full synthetic.

There are guys on forums that will argue all day that one has to run 0 -? weight oil. Anything else will kill your motor. It has to be true, they read it on the internet.