For me Losi's fuel tanks have been superior since they have clunk like a rc airplane, the leakage issue with the lids is when people pull the lid way too far and bend the spring. The clunk just has to be checked out periodically and make sure it's at the back of the tank. Other than that, Losi's tanks are the best since I don't get a darn flameout whenever a lazy turn marshall takes they're time getting to my buggy/truggy.