Nitrogen Fill is a common dealer add-on costing $199-$499 that provides negligible benefit over regular air. Regular air is already 78% nitrogen. For street driving, the difference is undetectable. In California, selling nitrogen fill under 95% purity is now banned under SB 766 as a "valueless" add-on.
Verdict: Junk Fee
$199 - $499
Why Dealers Push Nitrogen
- • Claimed benefit: "Better tire pressure retention" and "cooler running tires"
- • Reality: Studies show <1 PSI difference per month vs. regular air
- • Cost to dealer: Under $5
- • Profit margin: 95%+
How to Decline
Negotiation Script
"I am declining the nitrogen fill. Regular air is 78% nitrogen, and studies show no measurable benefit for street driving. Please remove this from my contract."