15w-40 in Prius

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Sorry for not clarify.

1226 = Gen 2 Toyota Prius Touring Model (2008)

Here is a screen shot taken just after OC w/ RP 5w30. No "Hypermiling" techniques are used, I drive normally & move along with the traffic except I do not go over 80 mph & use cruise control whenever safely possible.

Ran out of gas at 586 miles & took 11.4 gallons to fill-up (factory spec says 11.9), 586 divided by 11.4 gallon equates to 51.4 mpg.

When I ran M1 best I could get was around 49 mpg, German Castrol was around 48.4, SuperTech was around 47.9 while the good old Castrol GTX dino yielded 47.5 mpg.

I haven't tried Amsoil or Redline yet, but so far Royal Purple yielded best results.

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