I have had several questions floating around in my head for quite a while about proper suspension maintenance. My story begins a couple of cars ago when I couldn’t find answers, and ends here with this multi-part, OCD-approved question. My 09 M35x has just gone over 56,000 miles and I’m thinking I am past due for shocks (they’re originals, I believe). After riding in a G37xS the other day and noticing how much more compliant it felt over speed bumps and the like, my awareness of the issue increased.
When I go and look at various message board/etc. sources online, seems like whenever someone has tried to ask a serious question about their suspension, some dudebro usually replies with, “Aw man just put Bilstiens on there and lower it brah.”
The age of the American car and light truck fleet is the oldest it’s ever been, according to data firm R.L. Polk. Polk said in 2012 the average age all light vehicles on U.S. roads was 11.4 years, up from 11.2 years in 2011, and 10.9 years in 2010, the eleventh straight annual increase.