It shouldnt stay but I've heard of it glitching sometimes.
Car Wash will/should get her right.
Believe it or not I actually got a PP boost form a car was once, coincidence?
Could very well be a coincidence but I once heard someone say that they thought a car wash slightly improved handling.
If a certain set of wheels can *apparently* make your car faster in drag racing, I wouldn't doubt it if washing your car improved the handling, considering how broken Gran Turismo 6 Beta-- I MEAN Gran Turismo 5, is.
*Not sure if its true. Some drag racers here make me want to gouge my eyes out.
It is true. I dont know if you remember what Shells_n_Cheese went through, proving his BMW M5 time was legit, by giving up his entire tune, specific rims and proving that the gear ratios change (on some cars) when you apply the BBS_LM_R's.
It had been rumored/known for a while, aftermarkets made some cars faster. We just didnt know what Rims, nor realized the ratios changed after the installation. Because no one could get his ratios he finally "revealed" what was happening.