Excessive oil consumption issue?

MMO in the oil is not a problem at all. A small amount helps keep lifters clean and rings free - not as much of an issue with Synthetic

- and also helps keep oil free-flowing when cold - also not an issue with synthetic - That said - a lot better to put it inthe oil directly than to have it carry dombustion byproducts into the oil from using too much in the gas.

The problem seems to be faulty rings and Subaru has replaced rings and shortblocks. If it's an evaporation issue then every car would be experiencing excessive oil consumption. I use 0W-20 oil and have no consumption issues.

I'm curious as to what your opinion of this product is which I've been using in my '14 Forester?

Personally I'm not a big fan of Moly in an engine. If you are using a tog quality oil and changing it anywhere near often enough you are trying to solve a problem that basically doesn't exist. Moly in a gearbox is a different story - Not saying moly will harm an engine - but I have seen no conclusive evidence it helps - and some moly products tend to get stripped out by the filters - negating the advantages, if any - and restricting the filter. Not as bad as teflon - - -

I believe it is most likely a break-in problem if it burns oil from day one. Overheating will do it too, if the oil consumption "sneaks up on you" - as will a head gasket leak. Antifreeze in the oil WILL damage rings (and bearings)

Thanks for your opinion, I do appreciate it.

And many of these ring replacements have proven to do nothing.

Perhaps the repair is just a smokescreen for a faulty design?

Remember Subaru's "new" and improved headgasket that was to fix the headgasket problem? There were two or three new headgaskets promising a fix.

Similarly several ecu reflashes promising to fix auto transmission hesitation problems (auto paired to the six cylinder engine).

Who remembers the steering column shake in the new Legacy circa 2010? Subaru was installing some spring tensioners, or something. It took a complete redesign to truly fix the problem. Subaru cannot afford to tell customers outright that it cannot fix some of the problems so it makes up fixes while not informing the public of the true nature of things, that why they are mum about the excessive oil issue.

It may be very revealing that the next generation of cars will have different, re-designed (?) engines. I will bet you we will no longer hear about excessive oil consumption.

Basia

I used to use 3 ounces of MoS2 by LiquiMoly added to 4.5 quarts of oil. It is very good for winter cold starts but can be corrosive, that is why I used only a small amount (not to overpower the oil's own antirust additives).

Here is a link to an interesting discussion:

Links to original articles still work. Basia

Started driving Acura RDX as of today again, Nov. 18. Icy road from last night's wet snow. I admit Subie has best AWD system, otherwise RDX is more civilized car. Back to what I am used to. Even my dog seems to like going back to riding Acura in the back seat hammock, LOL!

Following thread makes me wonder if problem extends to 2016.

Anybody know?

I intended to get new after bulk of winter is gone. I had the head gasket problem on my '03 with it popping up again although leaking has stopped.

This week weather is little chilly with icy road conditions. Overnight temp. ~-10C. Now I know why Subaru had difficulty starting in the morning. Battery has only 390 CCA rating vs. RDX 610 CCA.

Yikes! We may get to the 20s tonight on Long Island, that's nothing compared to the temps you're seeing in Canada.

That is a big disparity in cranking power between the two vehicles. Enjoy your RDX, I wish you many years of good driving (and health).

390 cca was always considered adequate for cranking a big-assed 390cu in Ford V8. A 2.5 liter engine should start easily with a 200cca battery.