Between oil changes: the quick checks that catch problems early

Print this checklist

1. Read the oil level every few fill-ups

   On level ground with the engine off and settled. If it reads near the low mark, top it off with the grade on the oil cap and note the mileage.

2. Watch how fast the level drops

   A quart over many thousands of miles is normal for some engines. A quart every few weeks is worth mentioning at the next visit.

3. Look under the car where you park

   Dark brown spots usually mean oil; reddish ones often mean transmission or power steering fluid; green, orange or pink spots with a sweet smell usually mean coolant.

4. Check tire pressure monthly

   Use the door-jamb figure on cold tires. Reno's temperature swings between day and night move the reading more than people expect.

5. Glance at the coolant overflow tank

   Only when the engine is cold. The level should sit between the marks.

6. Keep the washer fluid full

   Dust in summer and road spray in winter both empty it fast on I-580 and US-395.

7. Walk around the lights

   Once a month, with the car running and the lights on.

8. Notice the wipers

   Streaks, chatter or a skipped patch mean the rubber is worn.

9. Pay attention to new sounds and smells

   A whine when turning, a burning smell after a drive, or a ticking that was not there before are all worth a look.

10. Note any dashboard light that comes on

    Write down which one and when. The oil pressure light means pull over safely and turn the engine off.

11. Look at the sticker or the reminder

    Check whether miles or months will come first. Short trips and dusty roads can make the months matter more.

An oil change every few thousand miles is a good rhythm, but a lot happens to a car in between. Engines can use a little oil as they age, high-desert dust settles into filters, and a slow leak can go from a drip to a puddle in a month. None of these checks need tools beyond a tire gauge and a rag, and together they take less time than filling the tank.

Why the high desert makes these checks worth doing

Reno gets about 7.4 inches of precipitation a year (NOAA 1991-2020), so the air is dry and the roadsides are dusty, especially off the pavement in the North Valleys or on gravel drives in the Carson Valley. Dust finds its way into air filters faster than in wetter places. The same normals show 65 days a year at 90 F or hotter and 122 nights at or below freezing, and that swing works on rubber seals, hoses and tire pressure.

None of this means a car here needs constant attention. It means the small checks catch the things that change between visits, while the maintenance check at each oil change catches the rest.

When something looks off

Low oil between changes is the most common thing these checks find. It can come from a slow leak, from an engine that burns a little as it ages, or from an interval that is simply too long for the way the car is driven. The low oil page lists the usual causes, and the oil spots page helps you read what is on the driveway.

Bring the car to any of our four service centers and tell the technician what you noticed. We check the level, look for the source of any leak we can see, top off what is low, and tell you what we found. Repairs beyond what we do are pointed elsewhere, plainly.

Make the next change easy to remember

Many modern engines on synthetic oil run 5,000 to 7,500 miles between changes (AAA), and the owner's manual sets the number for your engine. Our What's Due tool works out the next date from your mileage and driving, and the email club can send a reminder when it is close.