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10w30 amsoil ss to 0w40?

Discussion in 'The Greasy Spoon' started by Rambro, Feb 4, 2018.

  1. Rambro

    Rambro Well-Known Member Established Member

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    Last year I got a oil analysis on my 10w30 amsoil ss and everything was fine except it sheared down to a 20 weight. Was thinking about trying the 0w40 ss or would I be better off sticking with what I got? My car probably sees less than 2k miles a year but a lot of pulls to redline and gets driven in all climates but I usually don't drive it if its below freezing.
     
  2. old01cobra

    old01cobra Member Established Member

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    I work for Benz and a lot of our AMG stuff runs 0w-40. With that said they do consume a decent amount of oil especially the 156 engine. Not sure I would run that 0w40. Plus a lot of the buckets get chewed up as well as the cams. I know its not apples to apples different valve train setups etc but 0w-40 is like water when pouring in. Maybe try something like rotella 5w-40 t6. Or just change the oil 1 more time and watch the oil pressure....
     
  3. Rambro

    Rambro Well-Known Member Established Member

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    Too late already got the amsoil 0w40. What brand oil is going in the benz thats failing? Everything ive read on bitog leads to alot of the 0w40's basically being a heavy 30 weight.
     
  4. SID297

    SID297 OWNER/ADMIN Staff Member Administrator

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    The 0w40 SS is good oil. I'm really surprised the 10w30 sheared down.
     
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  5. Rambro

    Rambro Well-Known Member Established Member

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    I was too. I attributed it to being driven mostly in summer and the track and street fun but maybe something else is going on.
     
  6. 96gt02

    96gt02 Active Member Established Member

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    I also work for Benz, the 0w40 used to mobil 1 but then they switch to their own brand.
     
  7. old01cobra

    old01cobra Member Established Member

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    Mobile 1 like 96gt02 said. We still use Mobile 1 in the AMG vehicles as well as the high soot Mobile 1 esp on the Diesels and then we use the Benz branded oil for the pre-paid services.
     
  8. UnleashedBeast

    UnleashedBeast Engine Lubrication Guru Established Member

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    Was is actual shearing, or fuel dilution? You should have a percentage of dilution on your oil report.
     
    Last edited: Apr 16, 2018
  9. Bdubbs

    Bdubbs u even lift bro? Premium Member

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    I should send mine in. I'm running Amsoil ss 10w30. But less than 1k miles and e70 and e85.

    Sent from my [device_name] using the svtperformance.com mobile app
     
  10. Rambro

    Rambro Well-Known Member Established Member

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    I dont remember the details of the report and I can't find the report from last year. Im slacking lol I havent even sent out this current sample yet. I'm liking the 40 weight so far. I have a noisey engine and it seems the 40 weight quieted it down a bit.
     
  11. Rambro

    Rambro Well-Known Member Established Member

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    Got my report from blackstone on my last amsoil 10w30 drain. Everything was within spec and tbn was still good at 7.5. Only thing was viscosity @ 210 was a little low at 56.2, should be in the 58-65 range. No fuel or water in the oil either. Oil saw about 2k miles but thats 6 quarter mile track passes and I don't know how many pulls in Mexico on pump E75 full time. Probably could have ran it longer but it was in there for a full year.
     
    Last edited: Apr 14, 2018
  12. UnleashedBeast

    UnleashedBeast Engine Lubrication Guru Established Member

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    I'd prefer to see the specs in cSt to make a determination.
     
  13. HardMike

    HardMike New Member

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    Yes, specs the best decision.
     

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