Hybrids and diesels, answered

It needs them on the schedule in its manual, which is often similar to the gas version of the same model. The engine runs less, but it also starts and stops many times a trip and often runs cool in short city driving. Follow the manual's miles and months, whichever comes first.

Whatever the manual specifies, which on many current hybrids is a very low-viscosity synthetic such as 0W-16 or 0W-20. Using a thicker oil than specified can hurt fuel economy and is not what the engine was designed for. We look up the grade before we fill.

The high-voltage system is off-limits; we do not touch the orange cables or the hybrid battery. Oil, filters, wipers, bulbs and most fluids are serviced like any car. Some hybrids have a separate inverter coolant loop with its own interval, which we note when we see it.

Not for its first five model years. The Nevada DMV exempts hybrids in the Washoe and Clark testing areas for five model years and tests them from the sixth. Our two Reno service centers test hybrids once they are due.

Electric vehicles are exempt from smog checks (Nevada DMV) and have no engine oil. They still have wiper blades, cabin air filters, bulbs and tires, which we can check and replace.

Diesel engines produce more soot, so diesel oils carry more detergent and dispersant and are rated to diesel categories such as API CK-4. Many late-model diesels with exhaust aftertreatment require low-ash oil. Use the specification in the manual; we match it.

Mostly volume. Heavy-duty pickup diesels hold far more oil than a car, and the filter is larger. Our diesel oil change cost page lists published figures for the common trucks.

In the Washoe testing area, diesels up to 14,000 pounds GVWR test every year at renewal after their first three registrations; heavier diesels are exempt (Nevada DMV). The 2026 Washoe cap for a diesel test is $67 plus the $7 certificate, according to the DMV's emissions page.

Ask at the counter. DEF is a separate fluid in its own tank with a blue cap, never mixed with fuel, and the gauge or message center tells you when it is low.

Fuel filters are a separate service with their own interval in the manual. If yours is due, we tell you and you decide.

Many are, by their own manuals, if they tow, idle for long periods or run dusty roads. Northern Nevada work trucks often do all three.