Mileage, time, oil type and driving style all set your interval. We explain the 6-month rule, what full synthetic buys you, and why short trips are hardest on oil.
The old 3,000-mile rule died with mineral oil. With modern full synthetics, most cars happily run 7,500–10,000 miles between changes — but mileage is only half the story. Oil degrades with time, heat cycles and contamination whether you drive or not.
That's why we preach the 6-month rule: whichever comes first, mileage or six months. Short trips are the hidden killer — the engine never fully warms, fuel and moisture accumulate in the oil, and sludge forms faster than in a car that commutes on motorways.
Oil Type and Driving Style
Full synthetic resists breakdown far longer than blends, flows better on cold starts and keeps turbos — which cook oil at extreme temperatures — alive. For most modern engines it's not an upsell; it's the specification.
Tow regularly, drive dusty roads, idle in traffic or own a turbo or hybrid with frequent start-stop? Move to the shorter end of your manufacturer's range. Check the dipstick monthly: dark is normal, gritty or milky is a conversation with us.
Simplest of all: let us track it. Every TorqueHaus oil service sets your next due date on a windscreen sticker and an email reminder — free, and it has saved more engines than any additive ever will.
