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digital rules · 07-10-2015, 07:55 AM

Yes, the thinner oil may give you a slight improvement, especially on cold starts. OTOH, brand new tires may reduce your MPG's compared to your previous tires until they wear in a bit.

07-10-2015, 07:55 AM	#27 (permalink)
digital rules What brake pedal? Join Date: Feb 2014 Location: Chantilly, Virginia Posts: 210 Silver Streak-5M - '05 Toyota Corolla S Team Toyota 90 day: 42.41 mpg (US) Thanks: 107 Thanked 45 Times in 38 Posts	Yes, the thinner oil may give you a slight improvement, especially on cold starts. OTOH, *brand new* tires may reduce your MPG's compared to your previous tires until they wear in a bit. __________________