Quote:
Originally Posted by DieselScout
The engine feels much livelier with the 30 weight than it did with the 40 weight.
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What does this mean??? (engine feels much livelier)
I used to feel like my car performed better immediately after an oil change. Even with the same brand/viscosity as before. What did I base that on? "Seat of the pants" testing, fueled by creative (wishful?) thinking.
![Big Grin](images/smilies/biggrin.gif)
Did it correlate with actual measurable results? Who knows? Are there ways for us to measure any conceivably tiny improvements?