Hi David, Next time I get to wally world I'll check out Royal Purple. I purchased the bars leak lube for winterizing my pressure washer. Couple ounces of anti freeze and small amount of bars leak lube. The I thought it may help prevent failure of water pump in my Edge. ( very poor design ) I'm also retired, 76 years young, have time on my hands and like you always thinking about over kill , must be how we were raised?? Our Edge has 68,000 on it now, So far no problems. I did change belts, more over kill. Still have original tires and brakes. Hard to believe how well the Michelin tires wear. Rotate about 7,000 miles. I switched from Motorcraft synthetic blend oil to Valvoline full synthetic . After switching oil the mpg increased about 1 mpg, engine is quieter and smoother. We take a 3 to 4 thousand mile road trip every year, average mpg has been 26.6 - 26.7 I think pretty good. I drive the speed limits or a little over. Sorry about being long winded
Larry
Northwest, In.