The other day I was at Kragen looking at the Chevron Delo 400 15w-40 gallon jugs and noticed that some say its ACEA A3/B3/E3 something like that. But the other bottles just say ACEA B3/E3 so doesn't say A3 on some of them. So are the Chevron Delo 400 15w-40 not rated ACEA A3 anymore? I might use this oil in my 02 VW Jetta GLS 2.0L next oil change. I hear that using heavy duty motor oil for cars may reduce fuel economy and affect catalyst activing. So is it a good idea to use this oil for my car and do 5000 mile oil changes?