Diesel/DEF Combo Locking Caps for 2023 Ford F250 F350 F450 - DIESEL ONLY

I ordered these on the recommendation from Powerstroke Tech Talk on YouTube. I want to know that my truck is safe from someone stealing or contaminating my diesel. These are the highest quality caps available. You get what you pay for and these are totally worth the money. It’s nice to know that no one except me has access to my fuel now.

Material is A+. Def cap locks fine. The diesel cap doesn’t. Did receive slimmer gasket. Still not thin enough for the cap to fully seat in the neck filler to lock. I’ve read some 24s work, which I don’t get it. Wouldn’t think ford switch something in the later 24 model. Going to a metal machine company to fix the problem. Company did communicate good, but towards the end, ghosted me.*Update* received cap back from machinist. Cut a grove into the cap so that the large gasket can sit inside the cap. Cap turned all the way on and locked perfectly, with gasket sealing around neck filler.

Order placed and received in a very timely manner. Product fit as described (even better!) and constructed of quality materials. Could not be more pleased. Now feel little more secure when leaving truck at trail heads and such for a couple days. I have a '24 F-450 with the black painted fill tube so solid fit. Highly recommend.

I have a 2024 F350 Platinum and it fits perfect both caps. Really tight fit and locks well I dislike the long key but I keep one in the truck and one at home wouldn't put one on a keyring for sure.

Cap (green) would not open any longer and when we finally got it off, could not put back on. Such a bummer because its a great concept and loved it, but had issues from fist use and finally had to throw out. Ill search for another because I love the logic of it... but unfortunately, this one part was a loss - the DEF cap has zero issues. I am thinking perhaps I had a faulty gas cap, but idk.

Excellent quality and craftsmanship on these cap. Locks tight.They send two different gaskets to use. I found the thicker one allowed the cap to be turned off when locked, whereas the thinner one works just fine. Definitely would purchase again.

fit great on a 2024 F250 and adds security. Lock is a bit cumbersome with the long key but still will give this product a 5 star for overall quality and looks.

Seems well made. Fits snugly. Looks good. Locks easily — and then it can just be unscrewed. Doesn’t actually lock anything. Only slightly harder to remove than factory plastic caps — so worthless. Same is true of both diesel and DEF caps.