Join the Car Talk Community!

Posts Tagged "additives"

All posts below are tagged with "additives" (Browse all tags)

Mercedes Care: Just add . . . Urea?

Dan's dealer says he'll need to add urea to his new Mercedes's engine. Is this necessary or is Dan getting suckered?

Today: Do Gas Additives Actually Improve Performance?

Why should John pay his dealer for a fuel-induction service when he can save $100 by using a gas additive?

Today: The Firebird and the Angry Little Brother

I learned that a "homemade octane booster" had been added to the gas tank of my friend's early-'80s Pontiac Firebird by an angry little brother.  The engine was running better than ever the next day.  Coincidence?

Should you wait until your car overheats to fix a blown head gasket?

I have a 2002 Subaru Forrester. Upon my monthly check of fluids, I was shocked to see that there was no cooling fluid in the reservoir. I immediately took it to the shop, where they told me the head gasket was...

Does extra nitrogen in gas really do anything?

Is there any merit to the claim that nitrogen in gasoline has any benefit for cleaning the engine? What's the chemistry behind it? Or is this just the latest gasoline-additive scam? -- David TOM: Hmm. Maybe they're trying to get...

What happens when gas sits around inside a car that's been parked for a year?

My son has been in Iraq for almost a year. He left his car with us, and it has been sitting in the driveway the whole time. My plan is to sell the car and send the money to my...

Can I add rust inhibitor to my antifreeze?

I've heard you guys talk about antifreeze and the need to replace it every year or two because of radiator rusting.

Rocket Fuel