can i use regular gas?

what do you mean regular gas?? if it's a diesel you can't use unleaded gas only diesel. If your talking about the Octane level for unleaded gasline yeah you can use any of them

Rich, you are trying to be a smart ass, or what? Everyone knows that regular gas means 86 or 87 octane. I also want to know if the new Toyota Land Cruisers will burn “regular” gas, 87 octane, with no problems, or does Toyota recommend the high-octane premium leaded gas. At all the stations I go to, you can only buy unleaded gas or diesel. They haven’t sold leaded gas in decades.