EDT all day long, actually has LX4 in it already. If you buy directly from them 1gal at a time it's crazy cheap compared to buying it on the fly. Ran out of it a bit ago and started using the white bottle power service anti-gel. Can't say I'm happy though the engine is noticeably raspier. Going back to EDT asap. My order finally came in. Used it since the first fill up, avg every other tank. 56k miles since July and not a single issue. You can hear how smooth the engine runs on EDT. Highly recommend. I also usually fuel at truck stops only.