They now have a full synthetic mobil 1 for high mileage. i picked some up for my oil change today.

 

It is good stuff since it comes with the Mobil 1 branding. I would use it without thinking a second, but then how many miles do you have.

I am presently using Pennzoil HM 5W30 with 125K on the odometer.

 

I have over 120,000 miles on it. i have put 100,000 miles on since 2001.

 

What is ur motivation to use HM oils?

I am using it becoz there is a leak in the seal and HM oils have seal swellers to recondition the seals.

It is new technology that came out a few years back and every blender has one HM oil on their road map (Mobil1 being one of the last).

 

I just saw it at the store last week. I wonder how it compares to normal Mobil 1 and if it's worth using if you have high mileage but no problems.

 

Mobil 1 high mileage--according to Mobil is for engines that have experienced previously the following:
1. conventional oil used 2. severe service 3. extended oil drains 4. multiple owners

 

high mileage oils are not "new technology", and there is nothing particularly special about the oil itself. it is a marketing gimmick more than anything. oil companies are always trying some new marketing scheme to win market share, and HM branding seems to work, so they all do it.

generally speaking, the difference in today's HM oils are:
1) generally slightly thicker -- even though there's little evidence to suggest high mileage engines actually need thicker oil.
2) a tiny bit more detergent/dispersant to keep contaminants in suspension. all oils have these anyway.
3) may or may not have additional aromatics, phosphates, and/or esters for seal swell (to help prevent leaks). but all oils have one or more of these anyway.

but this is how all oils should/could/used to be formulated anyway, before API SM that it. ever notice how many HM oils are not API SM GF-4 rated?? API SM/GF-4 dictates lower additive levels for emissions, and most SM/GF-4 oils are also "energy conserving" meaning they are thinner than before for better fuel economy. so... "regular" SJ/SL oils generally had more robust additive packages, and many were a tad bit thicker (just like the new "high mileage" oils). see where I'm going with this?

in fact, there are still some "regular" dino oils that would be better "HM oils" than those that are branded as such.

having said that, given how the market has evolved, HM oils are generally quite good for newer & old cars alike -- b/c they generally do have a more robust additive package than their standard mileage counterparts. but calling it "high mileage" is just a gimmick designed to capture market share (ALL cars are high mileage cars, eventually).

some HM oils (regular maxlife) contain 20% PAO synthetic oil and a hefty additive package, and are therefore very good oils regardless of miles. I think they now call it maxlife syn blend, but it is the same oil.

all diesel oils could be called "high mileage" b/c they have to strongest add packs of all oils on the shelf and are thicker too. but they contain lots of zinc and phosphorous, which is bad for the cat.

I'd be interested to see the spectrum analysis of Mobil 1 HM. it's probably just their newest Delvac diesel oil repackaged. New diesel oils have less zinc/phos for the new diesel engines that have cats. it doesn't take a genius to see that same diesel oil would be a very strong PCMO (passenger car motor oil). call it "high mileage" and voila, a new product.

but almost all synthetic oils have a more robust additive package than any dino, and could therefore be considered "high mileage" as well (except for the viscosity, which is so close it doesn't really make a difference).

 

my car has about 123k miles, and I just changed oil 500miles ago - it was black. I had changed oil less than 3000 miles before, when i 1st got the car, just dino and fram. After this recent change, i found that the local Atlantic Superstore (grocery) had 'Special' Mobil 1 HM in a 1 gal PLUS 1qt package for $19.99 CD - about $17 USD. I'm buying several since Canadian Tire sells M1 for $39 gal. get enough for a couple years.
Here in Halifax the gas price is 1.19 per litre = $4.50 gal CD / $4.04 USD. I just heard it's crossed $3 in the US this week.

 

What's the viscosity of that oil at 100C? Some M1 oils are really thin and not always the best match for 5W-30 applications.

 

You should be good to go with Mobile 1. Pretty good oil and it's cheap at walmart.