I just put in a bottle of REGANE two tanks ago and after filling up on Sunday I had 296 miles on that tank. I was previously getting 235-240...I recently changed my oil to T/A dollar store semi-syn from Citgo HM...we'll see if this keeps up!!!
Regane® showed noteworthy drivability gains in my wife's 4.0, unlike Seafoam (both eliminated knocking as warm weather arrived) This naturally turned back to normal as the PCM readjusted the long term adaptives for the injector pulse width. Economy was marginally increased about about .5-1 mpg.