FAQ

Motor Oil FAQs:

Are Royal Purple lubricants compatible with other motor oils?

Yes. Royal Purple lubricants are fully compatible with mineral or synthetic oils. No special procedures are necessary when switching to Royal Purple.

Can I put Royal Purple into my brand new car?

Yes. Royal Purple currently offers many viscosity grades of API-licensed motor oils. To allow for proper break-in of the engine, Royal Purple recommends waiting until the manufacturer's first scheduled oil change or a minimum of 2,000 miles in new gasoline engines. Allow 8,000 to 10,000 miles before using Royal Purple in diesel engines.

Is a special oil filter required when using Royal Purple?

While no special oil filter is required, we do recommend upgrading to a high quality oil filter. A high quality filter will prevent contaminants from circulating through the system and causing damage.

Royal Purple now offers extended life oil filters. See our oil filter information page for more details or visit our dealer locator to find the dealer nearest you that carries our new filters.

Where do I find Royal Purple products other than 5W30 and 10W30 motor oil?

A number of retailers provide us with a listing of the products they regularly stock. You can find this information on our dealer locator page. Many of retailers will special order products that they don't regularly stock.

Can your motor oils be used in older engines?

Yes. Mileage and/or age is not a factor when used in a mechanically sound engine. In high-mileage applications, we do recommend running a minimum of two short (3,000 mile/5,000Km) intervals before extending the oil drain intervals. This will enable Royal Purple's high solvency to remove existing deposits gradually; such deposits can restrict oil flow, if excessive, as well as reduce the oil service life significantly.

Will synthetic oil cause my engine to leak?

Properly formulated synthetic oils will generally not cause an engine oil leak. Synthetic oils possess a higher degree of natural solvency, which can clean and remove deposits left by previous oils. The removal of extensive oil deposits can expose marginal or damaged oil seals, which may then leak. If an engine currently has excessive oil consumption (i.e. greater than 1 quart / 1,000 miles) the recommended course of action is to solve the oil consumption problem before switching to a synthetic.

Should I use an oil additive with Royal Purple?

No. We strongly recommend against using any oil additives as do most automotive manufacturers. Engine oils are formulated with a fine balance of additives (anti-foam, corrosion inhibitors, anti-wear, detergent / dispersants, oxidation inhibitors), and more is not necessarily better. The use of an oil additive could upset the balance resulting in reduced performance.

Is Royal Purple synthetic motor oil?

Yes. Royal Purple Motor Oils are composed of a proprietary formulation of synthetic base oils and synthetic additives containing iso-paraffinic diluents.

Does Royal Purple maintain its purple color after it's put into service?

No. The dye that's used to color the oil dissipates shortly after being put into service. The color will turn brown at some point.

Why don't Royal Purple product prices rise and fall with gasoline prices?

First, a substantive factor in the cost of our lubricants is the cost of the proprietary additives we use. It's these additives that give our products their performance advantages. The additives are in no way connected to the price of crude oil. Second, crude oil is used to make gasoline and mineral based lubricants. Our lubricants are formulated using synthetic base stock that is not a component of gasoline.

Do your motor oils contain zinc and phosphorous?

Yes. All Royal Purple engine oils contain the zinc/phosphorous compound zinc dialkyl dithiophosphate (ZDDP) and are suitable for both roller and flat tappet valve trains.

Can your oil be used with flat tappet cams?

Yes. For stock or mildly modified flat tappet valve trains (<.525" lift), we recommend our SAE 10W40, 15W40 or 20W50 engine oils. In applications with flat tappet valve trains using high-lift cams and/or high RPM applications, we strongly recommend upgrading to our XPR line of engine oils as these have an even greater concentration of ZDDP providing excellent protection with the higher spring pressures. For a viscosity recommendation, contact our Tech Dept. at 888-382-6300.

Why doesn't Wal-Mart have more product?

We do not sell directly to Wal-Mart. Any product that is being sold to them is being sold without our knowledge or involvement.

How do you compare to Amsoil?

A study by North Carolina State university showed that Royal Purple improved fuel economy and reduced emissions when compared to Amsoil. Numerous independent users have also reported performance improvements when upgrading to Royal Purple. It's important to note that any lubricant manufacturer can point to specific lab tests in which their products excel as evidence of product quality. Royal Purple products excel where it matters, in real world applications.

MOTOR OIL FAQs

OIL FILTER FAQs

MOTORCYCLE FAQs

RACING FAQs

2 CYCLE-ENGINE FAQs

ROTARY ENGINE FAQs

TRANSMISSION FAQs

PURPLE ICE FAQs