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what brand or oil type should I use for Proton gen2 (2004)? and is it a good idea to flush the engine oil, it has 135K mileage so far.

I don't have the owner's manual.

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  • I've added the tags for you
    – Nick C
    Apr 19, 2018 at 9:44
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    What does it say in the workshop or owners manual? If not, ask at the dealer - they will tell you the grade and amount.
    – Solar Mike
    Apr 19, 2018 at 11:23
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    See this page....whichoil.info
    – Moab
    Apr 19, 2018 at 20:03
  • @SolarMike yeah, that's the problem, I don't have the Owner's Manual and the company don't have it too, asking me to go to their service center, which doesn't sound right to me.
    – Bear
    Apr 23, 2018 at 8:42
  • @Moab awesome, they have my car model, I can use Helix HX7 10W-40 Premium oil or Helix HX5 10W-40 (SN), Thanks
    – Bear
    Apr 23, 2018 at 8:44

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