quote:I sure agree here. Objective as we think we are-there is a subconscious urge to try for better milage when you are using a product that hopefully will improbe milage. For instanceyyou will resist the urge to do the things in a car that are fun-but unfortunately waste fuel. 3% is realistically as studies have been shown to increase milage with synthetics. And many times it is based on using a lower viscosity oil. I know that in industry we used to use Terrestic oils. Their synthetic oil used to be called Synnestic. They claimed a 3% increase when switching from an ISO 68 conventional oil (20 wt) to an ISO 32 synthetic (10 wt). But hey-not knocking it. Whatever you are doing-keep it up and be happy
Originally posted by ryansride2017: Sorry but I'm not a believer in huge MPG increases when choosing different oils (your's is 15%). The largest percentage gain that is observed when switching oils is when you switch grades (5W30 compared to 10W40). The maximum percentage increase is about 3% for each change in grade. Going from a 5W30 conventional to a 5W30 synthetic won't save you much gas. Too many people change driving styles, fuel type, or something else that changes their MPG and the driver thinks it is just the oil. Hey, but any increase is $$$ saved.