Just curious about opinions as I've switched the vehicles from mmo to tcw3. The reason I ask is that the pennzoil synthetic is ~$28 at Walmart while the Supertech is $12. I splurged and got the pennzoil for my first gallon, but it is expensive, and I'm wondering if I'll get identical benefits with Supertech, or the pennzoil premium at ~$16.
The ratio I'm using is 640:1, or 1oz to every 5 gallons of gasoline. After several tankfuls, so far so good. Subjectively, the engine seems smoother from idle on up. Objectively, who knows? My mpg are constant, pre use and post.
The ratio I'm using is 640:1, or 1oz to every 5 gallons of gasoline. After several tankfuls, so far so good. Subjectively, the engine seems smoother from idle on up. Objectively, who knows? My mpg are constant, pre use and post.