Mobil 1 High Mileage 5W30 Used Oil Analysis

[Huskymaniac]

I did a UOA on the M1 5W30 High Mileage oil I had in the engine for just over 6000 miles. I also had the Bosch Premium oversized oil filter and the AC Delco air filter on the car. However, I changed the air filter just before putting this oil in so there may have been some contaminant in the engine from when it had the K&N air filter in it. A couple of things that jumped out at me was the high TBN which means the oil had plenty of life left in it. Hell, some oils START with that level. There was also no measurable water in the oil. Yeah, my headgasket really needs to be replaced...NOT! The oil sheared down from 11.7 to 10.5 which doesn't seem too bad and the wear metals were nice and low. Has anyone else ever posted a UOA from an SVX?

[Bobb]

Hi everyone, I was recently at the Mobil 1 website and looked at the recommended oil for most protection in my 2011 Legacy 3.6L. Mobil recommended the 5w30 extended life Mobil 1. I think this would be a good choice for the SVX although in the 10w30 oil. I do not plan on running the oil 15,000 miles or 0ne year in the Legacy but I might in the SVX as I drive less than one thousand miles a year. Take care, BOBB

[svxcess]

I'm registered at Mobil 1 also.

Based upon huskymaniac's suggestion and analysis, I am using Mobil 1 0-40 with the Lubeguard BioTech Protectant. My rebuilt longblock by AWD has less than 9,000 miles on it so a high-mileage oil is not needed.

I drive less the polo less than 600 miles a year now and sometimes it is 3 months between starts. I wanted protection against dry starts and a weight that would flow easily into tight clearances in cold weather.


Read this post.

http://www.subaru-svx.net/forum/show...96&postcount=5


.

[Huskymaniac]

Originally Posted by Bobb

Hi everyone, I was recently at the Mobil 1 website and looked at the recommended oil for most protection in my 2011 Legacy 3.6L. Mobil recommended the 5w30 extended life Mobil 1. I think this would be a good choice for the SVX although in the 10w30 oil. I do not plan on running the oil 15,000 miles or 0ne year in the Legacy but I might in the SVX as I drive less than one thousand miles a year. Take care, BOBB

A few things to note. First, 10W30 doesn't work for people who drive in winter in the north. Second, extended life oils are for people who plan to run their oils for 15k miles. I personally can't bring myself to do that. And you would still need to change the oil filter every 5000-7500 miles to be safe. My oil analysis shows that I can easily go longer than the 6100 miles I did. But I don't want to go longer than that on the filter and I might as well change the oil with the filter at 6k. I don't need an extended oil for that. If I drove in even more extreme conditions or drove my car harder I would move toward M1 0W40 or Rotella 5W40, although I have some concerns about Rotella. Finally, I like having some of the seal conditioners that you find in the high mileage oils.

[Chuckls]

Looks like I'm switching to 5w-30 M1 MH my next oil change.

[processengr]

"Tonyistheoilguy" Thanks for posting that Tony! I may transition to the 0W-40, been using the 10W-30 M1 HM

[Huskymaniac]

Originally Posted by processengr

"Tonyistheoilguy" Thanks for posting that Tony! I may transition to the 0W-40, been using the 10W-30 M1 HM

How many miles are you going on the oil? Right now I am buying the 5 quart container of M1 5W30 HM and two quarts of the 0W40. The addition of the 0W40 brings the HTHS up very close to the threshold suggested by German manufacturers who are concerned about shear in high stress engines, still gives me some seal conditioners and flows well in winter temperatures. The 0W40 also helps increase the base number to enable longer OCIs but the straight 5W30 M1 HM seems to be good enough in that respect for my 6000 mile interval. I have to admit that this analysis has me tempted to push it higher though. I just don't know how long I want to keep that filter on there.