This is a clip from a website (
http://www.performanceoiltechnology....categories.htm) I found while trying to find info on the different types of oil bases about Amsoil oil . Could there be any truth to it ? It's their website so of course they're going to try to paint the rosiest picture possible , aren't they ? My Buick has always had Kendall motor oil used in it by the former user and I'm hoping possibly to stick with the same type of oil now that a change will be due soon . I"ve always used Valvoline or Mobil One products but I realize that I don't know much about the different types oils . Does it matter if you stick with the same base of oil ? I'm thinking that Kendall is a parrafin base such as Quaker .
This is the clip:
A friend told Boring about AMSOIL products. He promised better gas mileage - an important selling point with today's high gasoline prices - more efficient performance and longer life.
The vehicle had 40,000 miles on it when Boring installed AMSOIL products bumper to bumper.
"I did it all at one time, just to see the difference," Boring said. He installed AMSOIL Series 2000 75W-140 Synthetic Gear Oil, used AMSOIL Engine Flush and then installed AMSOIL 10W-40 Synthetic High Performance Motor Oil and AMSOIL Universal Automatic Transmission Fluid.
"I especially like the ATF," Boring said. "The truck shifts smoother and the transmission is quiet. All you hear is the tires on the ground. I've tried other synthetics, lots of them. I just never saw any difference. But, with AMSOIL, I saw a difference right away."
The first tankful of gasoline increased his mileage from 15 mpg to 20.5

mpg. "I swear I didn't believe it," he said. "I'm averaging between 19 and 21 mpg all the time.
"This stuff is awesome and I'm letting all my friends know about it."