I wouldn't worry about changing brands, use what you like. It's mixing brands that can cause problems. You never know how the additives in brand A will react with those in brand B.
I prefer Kendall myself. I have well over a million miles using it, and the engines always outlast the vehicles.

- seen in FOUR WHEELER mag July 2006 & OFF-ROAD mag Feb 2007 -
'84 4Runner ARBed 5.29s F&R,4.7 & 2.28 t-cases,hy-steer,BudBuilt skid,30spl Longs,36" TSLs,Chevys

'83 P/U, Buick 231 V6,Holley 4 bbl,Weiand intake,Downey headers,TH350 w/700R4 gearset