I got a new vehicle not too long ago, but I want to increase the low mpg. I was thinking of gifting it to my son this Christmas coming and want it to be in top shape since he would love to have a new car. Does anyone have any advice on the type of brands for synthetic lubricants that will help increase the mpg on my vehicle? I'm always up for trying better products, but it would be great if it's something I can afford as well, so if anyone knows a good synthetic lubricant that not only helps bring up the mpg but is also something that most people can afford, that would be great.