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  1. M

    Made the switch to GC 0W-30

    But now you're relying on the accuracy of the gas pump.
  2. M

    Made the switch to GC 0W-30

    My Legacy GT has a mpg display. Also, this model is only supposed to get 19/25mpg, so I don't know how I'm getting better than that. This is a no BS post, just my observations. Also, this mornings mpg is at 25.8mpg after my drive to work (slow rush hour highway) and car keeps running and idling...
  3. M

    Made the switch to GC 0W-30

    Just got home and sitting at 26.5mpg. This car is listed at 19/25mpg. Go figure. Runs and idles sweet.
  4. M

    Made the switch to GC 0W-30

    I own a new 05 Subaru Legact GT. Today I made the switch to GC 0W-30 at 3200 miles. First off the car idles like a completely different car. Great improvement. Car used to idle like crap, now it's hard to tell if it's running. Second, mpg went up significantly. Was averaging 20.5mpg and now...
  5. M

    SLUDGE ENGINE CAUSE

    My 98 Corolla 1.8liter 4cyl had 260k miles when I sold it. Never leaked, but ran bad if I let it go past 6k miles between oil changes. I didn't sweat it. Never used any special oil in it. My wife's 98 Camry 6cyl had tight valve seals and gave us major problems if we let it go past 3k miles.
  6. M

    Mix M1 5w-30 and CG 0w-30?

    Manual says 5w-30 and 10w-30 I believe.
  7. M

    Mix M1 5w-30 and CG 0w-30?

    First time poster, long timer browser. Great Site! I have a 2005 Subaru Legacy GT. This is a turbo charged 2.5liter. I've been torm been M1 5w-30 and GC 0w-30, but don't won't to pick a favorite since they are both supposed to be great. Would there be any issue if I were to mix them 50/50? Also...
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