Power increase of any sorts using any type of additive is a "no win" situation in my experience. Yes Dieselling will help provide more power and speed with springers,...but surpass that to the next level,...and you WILL have Detonation!!! Which is a bad thing!!!!! If you want a burnt seal, a busted spring, and a loud bang,...go ahead and try this 'snake oil' stuff,...but after a few shots your weapon will be ruinned. Why rifle manufacturers,...and 'preditory snake oil salesmen' want to market super high velocities and power, or 'enhancements' with regards to springers is beyond me. Let's face the facts,...springers are limited to what they can shoot,....not too light,...and not too heavy,...with super mags being an exception to the rule concernning heavy pellets,...but any normal weight pellet (say 7.65 to 8.8 grains) will lose stability in flight when hitting the upper 900 fps range. These weight pellets are just not designned to go that fast!!!!! With this in mind,...no shooter will ever have any consistant accuracy! There's a double negative whammy for ya!!!! Like I said,...a "no win" situation!! Got a Gamo,Crosman, what ever, shooting in the mid 800's to low 900's in .177 cal, and you should be tickle pink. With your normal mid-powered springer (.177 cal /1000 fps rated rifles) remember this,...high speed kills the following,...accuracy, consistancy,...and alot of missed varment and prey. Just my 2 cents, tjk