Originally Posted By: SubieRubyRoo
Plus they are also sending out confusing messages on their own products. They claim the Delvac conventional is greater than syn blends on one page, and then for their synthetics they point out how they can improve mileage by 1%.
Within the fine print, it's all true. When they're comparing their conventionals to other blends, they're comparing their own E7, E9 conventionals against blends that aren't certified as highly. When comparing their syn blends and syns for fuel economy, they're comparing to other oils that are less suited to higher fuel economy.
So, certain things are true; they just may not be noticeable or worthwhile for an individual case. If you're taking the lubricant out to its condemnation and running a lot of miles, you can get these benefits, as the case may be. The average user will never notice.