

Remember everyone. View tariffs as kind of a federal sales tax. Sales tax typically affect lower classes more than upper classes. It will also compete with other sales taxes at other government levels. Those smaller governments rely on it more than the federal government.
Meaning, to grossly oversimplify, this will ultimately cost more for people with less wealth, and it will degrade your local governments ability to provide services due to less income.
To answer OP’s question. They already have plans to pass more tax cuts for the rich (federally). That money has to come from elsewhere. This is one form of the elsewhere.
I have learned that some cars operate better with specific kinds of spark plugs. At some auto stores or mechanic shops, they may try to upsell you on better kinds, and for a lot of vehicles you do get what you put into it. However, on occasion for some cars, you actually will make things worse with those more expensive plugs. I had a car once where the upsell was always iridium plugs but they literally were worse than the cheaper ones and recommended to avoid for that specific motor.
This can also happen with gas. Some cars should never get higher octane fuels. Like some cars should only ever get 87 and no higher.
Really depends on the vehicle and unique needs of the engine. Usually the book will explain this or hardcore dedicated forums about their maintenance.
Also, buying your own OBD II code reader for like $30-50 can sometimes do wonders. I’ve had one for a decade now and when stuff goes wrong it is nice to be able to look up codes immediately and at least get some information or a vague idea on my own.