--- title: Towing and Oil Changes: The Severe-Service Schedule url: https://xpressoilandlube.com/guides/towing-and-oil-changes/ business: Xpress Oil & Lube (Xpress Oil & Lube Center) shops: Reno Northwest: 6100 Mae Anne Ave, Reno, NV 89523, (775) 787-1000, Mon-Fri 8 am-5 pm, Sat 8 am-4 pm, Sun closed; Reno South: 4993 Longley Ln, Reno, NV 89502, (775) 828-6996, Mon-Fri 8 am-5 pm, Sat 8 am-3 pm, Sun closed; Carson City: 1861 E College Pkwy, Carson City, NV 89706, (775) 883-5823, Mon-Fri 8 am-5 pm, Sat 8 am-4 pm, Sun closed; Gardnerville: 1293 US Hwy 395 N, Gardnerville, NV 89410, (775) 301-5912, Mon-Fri 9 am-5 pm, Sat 9 am-3 pm, Sun closed type: Drive-in oil change and vehicle maintenance, no appointment needed, since 1983 --- Today's coupons - $10 off full-service oil change - $5 off smog check - $25 off transmission fluid service [See all coupons](https://xpressoilandlube.com/coupons/) - [Home](https://xpressoilandlube.com/) - [Guides](https://xpressoilandlube.com/guides/) - Towing, hauling and the severe-service schedule # Towing and Oil Changes: Why Trailers Shorten the Interval Towing puts an engine and transmission under sustained load, which raises oil temperature and shortens oil life, so every manufacturer lists towing under severe service with a shorter oil interval. If you tow regularly, follow that column in your manual, and check the transmission and differential fluids on the same schedule. ★★★★★ 4.7 stars from 952 Google reviews Northern Nevada tows a lot. Boats go to Pyramid Lake, Lahontan and Tahoe, horse trailers run the Carson Valley, side-by-sides ride to the Pine Nuts and Moon Rocks, and contractors drag equipment up and down US 395 every day. Douglas County households average 2.25 vehicles and Lyon County 2.29 (Census ACS 2020-2024), and a good share of those are trucks with a hitch. The owner's manual of every one of them has a separate maintenance column for towing. This guide explains why, and what to check besides the oil. ## At a glance - AAA lists heavy loads and towing among the severe conditions that call for the shorter maintenance schedule in the manual. - Load raises oil temperature, and hot oil oxidizes and thins faster. - Transmission fluid and differential gear oil carry the same load; manufacturers shorten their intervals for towing too. - Altitude adds to it: at 4,500 feet the engine works harder for the same speed, and the grades to Tahoe are long. ## What a trailer does to engine oil An engine pulling 5,000 pounds up Geiger Grade runs at a wider throttle and a higher sustained load than the same engine cruising to work on McCarran. More load means more heat in the combustion chambers, more heat in the oil film on the bearings and pistons, and more blow-by past the rings. Hot oil oxidizes faster, its viscosity drops, and its additives are used up sooner. That is the mechanical reason the manuals shorten the interval; it is not a sales tactic. AAA's maintenance guidance puts heavy loads and towing in the severe-service group alongside short trips, extreme climates and stop-and-go driving, and says to follow the more rigorous schedule in the owner's manual when they apply. Many trucks with an oil-life monitor handle part of this automatically: the monitor counts load and temperature and shortens the countdown while you tow. A truck with a plain mileage interval needs you to pick the severe column yourself. ## Which column in your manual applies Most manuals define towing as a special operating condition, and some add a mileage threshold, such as towing for more than a certain share of your driving. If you pull a boat four weekends a summer, the normal schedule with an oil check before each trip is usually fine. If the trailer is on the hitch most weeks, or you tow in summer heat over the Sierra grades, the severe column is yours. Ford, GM, Ram and Toyota all publish those schedules by model year, and our [pickup trucks page](https://xpressoilandlube.com/vehicles/pickup-trucks/) summarizes the common ones. The oil grade does not change for towing on a modern truck; the interval does. ## The fluids that towing wears out besides engine oil Automatic transmission fluid takes the hardest hit. Pulling a load keeps the torque converter working and the fluid hot, and manufacturers list towing as the main reason to shorten the transmission fluid interval. The AAA transmission guidance notes that fluid darkening to dark brown or picking up a burnt smell means it has deteriorated. The rear differential on a truck or SUV carries the whole load through its gear set, and most makers publish a shorter gear oil interval for towing and gravel roads. Our [differential service](https://xpressoilandlube.com/services/differential-service/) and [transmission fluid service](https://xpressoilandlube.com/services/transmission-fluid-service/) pages cover what each one includes. Coolant works harder too, since the engine makes more heat for longer. Brake fluid on a tow vehicle sees higher temperatures on long descents like Kingsbury Grade into the Carson Valley. Both are checked on the multi-point maintenance check. ## Altitude makes every tow a little harder At our service centers' elevations the engine has roughly 13 to 15 percent less power than at sea level, using the 3 percent per 1,000 feet rule of thumb that Garrett Motion publishes, and the gap widens on the climbs. The truck compensates with throttle and lower gears, which means more time at high load for the same trailer. A truck rated to tow a given weight at sea level is working closer to its limit on the Mount Rose Highway, and the fluids feel it. The [high-altitude guide](https://xpressoilandlube.com/guides/high-altitude-driving-maintenance/) explains the physics. ## What we do for tow vehicles in the bay Tell the technician you tow when you pull in, and we set the oil-change sticker to the severe-service interval your manufacturer publishes rather than the normal one. On the lift we read the transmission fluid where the vehicle has a dipstick, check the differential level and look for seepage at the covers and pinion seal, read the coolant condition and look at the brake fluid. If something is due, we show you and explain the interval behind it; you decide what happens today and what waits. Diesel pickups get [diesel oil](https://xpressoilandlube.com/services/oil-change/diesel/) in the specification the engine requires. For fleets that tow daily, our [fleet program](https://xpressoilandlube.com/fleet/) keeps the service records so the severe schedule is followed truck by truck. Longley Lane sits closest to I-580 and the boat ramps south, Mae Anne Avenue to I-80 and Pyramid, College Parkway to US 50 and Lahontan, and Gardnerville to the Carson Valley trailer traffic. Drive in before the next trip, no appointment needed. ## Before you hook up - Engine oil at the full mark, checked cold on level ground. - Transmission fluid level and color checked if the vehicle has a dipstick. - Coolant at the full line and the cap seal intact. - Tire pressure on the truck set to the towing figure in the manual, and the trailer tires to their sidewall rating. - Trailer lights and brake controller tested before leaving the driveway. ### Sources - [aaa.com/autorepair/articles/how-often-should-you-change-your-oil](https://www.aaa.com/autorepair/articles/how-often-should-you-change-your-oil) (AAA: heavy loads and towing are severe conditions, follow the more rigorous schedule, read 10/15/26) - [aaa.com/autorepair/articles/Automatic-Transmission-Fluid-Service](https://www.aaa.com/autorepair/articles/Automatic-Transmission-Fluid-Service) (AAA: transmission fluid intervals vary with severe conditions, fluid color and condition, read 10/15/26) - [garrettmotion.com/news/newsroom/article/how-to-turbocharge-at-elevation-counteracting-lowe](https://www.garrettmotion.com/news/newsroom/article/how-to-turbocharge-at-elevation-counteracting-lower-air-density/) (Garrett Motion: about 3 percent power loss per 1,000 ft, read 10/15/26) - [toyota.com/car-tips/change-transmission-fluid/](https://www.toyota.com/car-tips/change-transmission-fluid/) (Toyota: shorter transmission fluid intervals for towing, severe weather and stop-and-go, read 10/15/26) ### Your service center: Reno Northwest - Call [(775) 787-1000](tel:+17757871000) Mon-Fri 8 am-5 pm, Sat 8 am-4 pm, Sun closed - Address 6100 Mae Anne Ave, Reno, NV 89523 [Directions](https://www.google.com/maps/dir/?api=1&destination=6100+Mae+Anne+Ave%2C+Reno%2C+NV+89523&destination_place_id=ChIJ3dFA7yBEmYARYg1CtQTi_Bk) Drive in. No appointment. Drive out. Locally owned in Northern Nevada since 1983. No appointment, no pressure: we tell you what the inspection found and you decide. [About us](https://xpressoilandlube.com/about/) ### Keep reading - [Oil changes for pickup trucks](https://xpressoilandlube.com/vehicles/pickup-trucks/) - [Oil changes for diesel pickups](https://xpressoilandlube.com/vehicles/diesel-pickups/) - [Differential service](https://xpressoilandlube.com/services/differential-service/) - [Transmission fluid service](https://xpressoilandlube.com/services/transmission-fluid-service/) - [High altitude, mountain passes and your engine](https://xpressoilandlube.com/guides/high-altitude-driving-maintenance/) - [Fleet service program](https://xpressoilandlube.com/fleet/) ## Questions people ask Still have a question? Call your service center or drive in; there is no appointment to make. ### How much sooner should I change oil if I tow? Use the severe-service interval in your manual, which is typically the shorter of the two columns. Many trucks with an oil-life monitor shorten the countdown automatically under load. ### Do I need a different oil for towing? Not on a modern truck. Use the grade and category the manual specifies; full synthetic handles the heat better if the manual allows a choice. ### Should I service the differential if I only tow in summer? Follow the manual's towing interval for gear oil, which is usually shorter than the normal interval. Light seasonal towing on the normal schedule with a level check before the season is reasonable. ### Does towing affect my smog check? Not directly. A well-maintained engine passes the same way. Heavier diesels over 14,000 pounds GVWR are exempt from the Nevada test; most pickups are under that. ### Can you check the trailer? We service the tow vehicle. Trailer bearings, brakes and tires belong at a trailer service center, and we will say so.