A/C Refrigerant
Short answer: No alternate refrigerant is a true “drop-in” for R-12, regardless of sales claims — each has drawbacks, and many react badly with R-12 mineral oil. At minimum, flush the system, fit a compatible dryer, use a compatible oil, and use the correct charging fittings.
For a Firebird system the practical choice is 134a — 134a refrigerant, 134a dryer, a multi-compatible oil, and a 134a expansion valve. 134a runs higher head pressure, so a twin-flow condenser is also recommended.
Any proposed updates, changes, pictures, and/or corrections, please use our comment section below (may need to click on permalink to access comments feature). Information is subject to change and offered as is without any warranties or guarantees. Please review our Term's Of Use for more information.
Content last modified: June 13, 2026 at 10:06 am
← Frequently Asked Questions
