frequently asked questions

How do I know which product variation to use in my car?

Most engines a use 5W30 motor oil for general use. Company most popular automatic transmission fluid is D4 ATF where a Dexron III, Mercon, or Mercon V is called for, as well. Referring to gear oils, your manual transmission will likely call for an ATF, GL-4 type or GL-5 type products. Red Line's popular MT-90 is a GL-4 type product.

How often should I change my Red Line oil?

It depends on how you drive. If you do a lot of city driving or low speed/low frequency driving, Company recommend oil changes at 7500 miles. Vehicles that see more highway driving can go a maximum of 15,000 to 18,000 miles with an oil filter change in between. Modern filter technology and the latest, clean-burning fuels have reduced the solids that contaminate oil, so frequent filter changes aren't usually necessary.

Can I break-in my engine on Red Line motor oil?

For performance engines, Company recommend using conventional 10w30 motor oil to ensure proper piston ring seating. Company recommend using this oil in combination with Company Engine Oil Break In Additive, which features the antiwear chemicals necessary to protect valve train components like camshafts, rollers and tappets. Though most conventional oils are missing the important antiwear components that you find in Red Line's synthetic motor oils, the conventional oil is not as slick as Red Line and will allow the piston rings to seat more quickly. If you allow 1500 to 2000 miles in a street engine or 20 to 30 minutes on the dyno at low rpm, the rings will have had sufficient time to seat and the high initial break-in wear will have occurred. For new road cars, always follow the manufacturer recommendations and initial oil change recommendations for break-in.

Do you recommend special oil for driveline break-in?

A differential or transaxle will break-in with a synthetic product without issue. Some aftermarket ring and pinion suppliers recommend adding additional friction modifier to reduce temperatures and friction during the critical break-in period. For this, you can use Red Line's Limited Slip Friction Modifier. Drain this mix after break-in and re-fill.

Can I use Red Line High-Performance Motor and/or Racing Oils in my rotary engine?

Our High-Performance Motor and Racing Oils have been used successfully in rotary engines in both racing and street applications from the beginning. Company oils don’t cause deposits in the engine which can cause poor performance, carbon locking of rotors or sticking apex seals.

Is WaterWetter compatible with antifreeze?

WaterWetter is compatible with all antifreezes including the new extended-life types that are "factory-fill" in your new road car. Simply pour in one bottle for most road cars or light trucks.

Is a special oil filter required to use Red Line Oils?

No, Company simply recommend using a quality filter, whether it's for your engine or transmission.

Should I flush my engine or driveline before using Red Line's synthetic lubricants?

A flush isn't necessary or advised, as Red Line's products are compatible and will mix with other synthetics and petroleum products.

Will using Red Line products void my vehicle's factory warranty?

Using the appropriate Red Line product shouldn't invalidate your vehicle's warranty and question the mechanic or service manager that says so.