Alright so we all know that they have products like seafoam and Lucas to clean out our fuel injectors. Whenever I was little I always remembered my dad (very smart with vehicles) putting maybe a gallon and a half to 2 gallons of diesel fuel in his 1992 GMC Sierra with the 4.3 V6. He always told me that this was one of the best ways to help clean out your engine and keep the system clean. I'm just curious if anybody ever runs diesel occasionally through their trucks mixed with gasoline. I only do this every now and then and since I have a fuel injected engine instead of TBI, I don't quite have the ratio that my dad used to use. I just filled up 23.178 gallons of gasoline and about 3/4 gallon of diesel fuel. What can this hurt?