Thread: Motor Oil

Oil changes are way over rated as to time intervals,syns can be used for well over 20K miles.
I used to race two Roush Mustangs,both well over 500 H.P cars.
Only way to know for sure what is going on with your oil is to send a sample to be anylized,I used Blackstone labs.
I ran my 75 chevy suburban for 75K with never an oil change,sold it at 200K miles, ran perfect.

I don't drive my car much. I usually put around 3K miles a year so I change my oil once a year. I use a royal purple filter and valvoline synthetic.

Change oil every 5k or so. Change both filter and oil. Use synthetic Valvoline "High mileage" blend. My 96' Tacoma just hit 270k miles. Its more of a weekend worktruck now, but I hope to get 300k out of it.

I've been a Castrol and Valvoline user since I got my first car. I stick with regular oil, not synthetics.

When I had my first car ('87 Corolla ) back in the mid 90's, I used to change the oil every 3K miles, then switched to 5K miles because the oil always looked clean when I changed it at 3K.

Nowadays, my Hondas turn on the maintenance light when the oil life drops to 15%. I start thinking about changing it then.

What abut additives? When I was a young man back in the 60's there were a lot of additives on the market. Products like Wynn's Friction Proofing, Marvel Mystery Oil, Bardahl and Risoline. Some of them are still around today but most folks don't use them. When I buy a new vehicle I usually run some Marvel Mystery Oil in the fuel. It helps to break in the valves. Any one use any of these products today?

As to additives, I think my best results are with Techron for the fuel. In some old smokers and plug-foulers, Restore and Lucas oil stabilizer works wonders sometimes in the oil. I believe in friction modifiers in auto transmissions and standards with syncro linings.
AT 205 from ATP will soften seals and slow/stop leaks in transmissions, power steering, and engines sometimes.

Mobile 1 synthetic in both mine. My 94 dodge pickup sits outside in the cold for weeks at a time without being started. Synthetic oil makes it much much easier to start it in cold weather.

Originally Posted by d. m. ellington

What abut additives? When I was a young man back in the 60's there were a lot of additives on the market. Products like Wynn's Friction Proofing, Marvel Mystery Oil, Bardahl and Risoline. Some of them are still around today but most folks don't use them. When I buy a new vehicle I usually run some Marvel Mystery Oil in the fuel. It helps to break in the valves. Any one use any of these products today?

Marvel Mystery Oil... wow, I haven't seen that used since I worked in my uncle's autopart store in the 90's.

I used to use STP Engine Flush on my first car, but I stopped after noticing that it didn't do much.
I currently use STP fuel injection cleaner on occasion.
I use Sea Foam to on my car (rarely) to clean the fuel injectors, and in the lawnmower & snowblower right before changing the oil. My previous, older Hondas would often get clogged injectors, so using Sea Foam always helped.

Sea foam is great stuff

Originally Posted by d. m. ellington

What abut additives? When I was a young man back in the 60's there were a lot of additives on the market. Products like Wynn's Friction Proofing, Marvel Mystery Oil, Bardahl and Risoline. Some of them are still around today but most folks don't use them. When I buy a new vehicle I usually run some Marvel Mystery Oil in the fuel. It helps to break in the valves. Any one use any of these products today?

I still use Marvel Mystery oil Comes in a big ol' plastic bottle now