How can I increase my mpg? What fuel to use?

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Originally posted by drdavidr4u
Synthetic oils
I assume you just drain out the old standard and fill with the synth?

You assumed right. You can switch from mineral oil to bland or to fully synthetic oil at any time. No any kind of special engine preparation procedures require.
Just stick with your manufacturer recommended viscosity grade.

Originally posted by drdavidr4u
Which ones are the best , where does one get the best prices?
Thanks

The best fully synthetic motor oil your money can buy is Mobil1 SuperSyn
If you ask me why, then my answers would be as following ->

1. It is a real! fully synthetic motor oil.
2. Available everywhere and accessible at any time.
3. Price cheaper comparably to other synthetic oil brands such as Royal Purple, Amsoil, and Redline.

IMHO!