You won't blow up tomorrow, but you took a pretty good thing, cheap oil and decent filter, and kind of messed it up by using an expensive additive. What is in the Lucas that you need in your oil? If you're going to spend the money on Lucas, why not just buy better oil? Additives can upset the balance of oil by introducing compounds into the oil that weren't planned for by the engineers who came up with the oil formulation in the first place. Additives are mostly only good for solving a problem. Find an oil that already has what you want in it. There are a lot of choices.
No, it's not. There can be a big difference between the cheap stuff and the premiums. The difference will show up in the extremes. Extreme temperatures, extreme pressures, extreme drain interval. BUT, that doesn't mean you need it, or that you can't do well with the cheap stuff.
Not even close. There are a limited number of base oil producers, but that number isn't exactly small. The number of blenders and packagers is quite substantial. The blenders buy the components for their oil on the open market, and are susceptible to availability of those ingredients. If they seem to be cagy about revealing what is in their products, they aren't necessarily just guarding trade secrets. They may not say because it changes depending on what's available to fit their production schedule.
Some of the best deals for cheap oil are Wal Mart and Napa house brands. 5 quarts of full synthetic for $15 of so. It will cost a little more than you spent, but it's a lot better. You can get Mopar filters at Wally's and Wix at Napa in the form of their Gold line.
I'm not trying to pick on you, but I spent a career in the motor oil business, and wanted to help clear things up, and maybe help you to make good choices in the future.
