:rofl
Again, like I said on the last page, it’s obviously dependent on platform. With MY car and my own personal EXPERIENCE over the last 3 years of owning it and tuning it, I’ve found out that the factory MAF/ecu is not sensitive enough to pick up on changes in air density. SO, in the WINTER, when it’s COLDER, it needs to be re-calibrated. Also, the LSJ motor has a non-return style fuel system, so the #4 cylinder bank (furthest away on the rail) runs especially lean when the temperature changes and melts pistons and other fun things of that nature.