You obviously have zero clue what you are talking about. The spring was not randomly selected. Rather, it was designed and went through a lot of R&D before being marketed. Those expenses was in the $1,000's of dollars by folks who are true diesel experts. Then, it was road tested for a while. THEN, it was marketed. OVER 80 of these have been sold and all 2 thumbs up as compared to your "experiment" which you discussed.

So, I guess folks can evaluate proven prior results, expensive R&D, and true diesel experts versus your one time experiment.

I guess even trolls take a stroll on these threads.