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In the 90s, I used M1 in all my cars. Mostly because it was a rumor, word of mouth and trend that it was the best stuff.
Not until very recently, after reading this thread, I hear it's bad.
Now, looking back, I remember whenever I checked my oil, I noticed my engines always "consumed" it...it would eat maybe around .5L in a month or 2's time (sometimes even a full 1L). I thought this was normal. But, I did notice it, and it only happened when I used M1. Whenever I used cheaper oil (cheap model penzoil, castrol, dealership oil changes, etc., etc.) it did not consume it. So, I guess it really isn't normal.
This M1 oil consumption happened in all engines that I owned and also helped change oil and maintained (friends and family).. sohc honda, b16, b18a and c, lsvtec, mr2 and also sr redtop. I also blew 1 engine, an sr redtop, with a rod through the block, due to oil starvation (though, I don't think it was due to the M1 oil ..it was due to a dented oil pan blocking the oil pick up, I believe).
I always thought M1 was one of the best oils ..I guess because "everyone" said so and thought so, and also because it was back in the 90s when I, and others, didn't know any better and useful internet forum information and UOA's were not commonly known yet.
It all makes sense now - M1 just loves to get eaten up (or somehow magically disappears) in any engine (not just subaru engines).
I will never use it again. I will stick with oem factory Subaru and/or Toyota oils. And, I will try Motul 300 on occasion and maybe Eneos Sustina too if I can find it off the shelf.
Anyone know where I can purchase Eneos Sustina off the shelf, in stock? ...either stores or dealerships in OC (preferably south OC).
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