# DIY Tesla Repair? **URL:** \ **Category:** General Discussion\ **Created:** [September 7, 2022, 7:29pm UTC](https://community.cartalk.com/t/diy-tesla-repair/186268 "2022-09-07T19:29:34Z")\ **Posts on this page:** 1\ **Showing post:** 45
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [September 8, 2022, 9:30pm UTC](https://community.cartalk.com/t/diy-tesla-repair/186268/45 "2022-09-08T21:30:42Z")
> [@TheWonderful90s](#): > > All these super efficient gasoline engines are actually direct injection engines, which is essentially what we call a diesel engine today. It’s really diesel engine technology made to run on gasoline. A gasoline direct injection hybrid vehicle should be able to average less than 1/50th of a gallon of gasoline per mile. This is bad news for EVs! 25% is at the low end of efficiency for diesels This ALL wrong. All of it. Direct injection is NOT the definition of diesel. Compression initiated combustion IS the definition of the diesel cycle irrespective of fuel. Direct injection has been used on gas engines as well as diesel. Mercedes Gullwings from 1955 used mechanical gasoline direct injection as did some WW2 German aircraft. Electronic direct injection for diesels was developed over 20 years ago. Using it for gas engines allows compression ratios as high as 13 to 1 with pump fuel because of the cooling effect of fuel evaporation when injected. Much greater efficiency than a 6 or 7 to 1 air cooled stationary engine --- _[View the full topic](https://community.cartalk.com/t/diy-tesla-repair/186268)._