why get a size bigger than the 350z?

I bought a CoverCraft brand custom fit cover for my G35 Coupe shortly after I bought the car in 2004. My car is garaged at night, but during the days it has generally had the cover on it while outside at my place of employment parking lot. I've kept a good coat of Zaino on the paint, used a California Duster to dust it and still get comments about how the car looks almost new after 5 years. It is Diamond Graphite color which probably helps camouflage some of the defects but the value of keeping the sun from beating down on the paint and upholstery cannot be denied. I'll buy another as soon as I find the 370 I'm looking for. Stay away from cheap covers, they will be harsher on your paint and if loose fitting, will billow and move around with the slightest breeze and rub against the high spots.

The car size chart sux, that's why. I too have a PepBoys cover and had to return 2 before I found a proper size. I finally settled on an SUV-C. Yea, SUV. None of the car covers were wide enough to completely cover the car - I hate having my wheels exposed. Bonus is that it's large enough to handle my Nismo S-tune wing as well

I've had the same cover for my 350Z as well