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Oil Change Service in Thornhill, ON

Grease it up and keep your engine happy!

Regular oil changes, (lube oil filter servicing or LOF,) are one of the easiest, most inexpensive ways to extend the life of your vehicle. Regularly ensuring your oil is clean protects your engine from friction-induced wear, and keeps your vehicle performing the way it’s supposed to.

Choosing the proper grade of oil is a critical step in engine maintenance. From conventional to full synthetic, your GM Certified Service Experts offer a range of oil types, including; ACDelco Conventional Oil, ACDelco dexos1 Synthetic Blend, and ACDelco dexos1 Gen 2 Full Synthetic.

The Certified Service Experts at Roy Foss Thornhill are professionally trained to understand how your vehicle uses its oil and how it monitors the life of that oil. An oil change performed by your GM Certified Service Experts not only enhances the performance and longevity of your engine at a great price, but you also get the added value of our expert looking over your GM vehicle.

Roy Foss Thornhill’s GM Certified Service Department offers a variety of oil change service packages, including those for diesel and synthetic oils, to keep your engine healthy and running longer. Don’t wait for your engine Oil Life Monitoring System to come on, schedule regular preventative maintenance and oil change service for your vehicle in good time.

Service Specials

No-Charge Inspections - Cabin Air Filter and Engine Air Filter
Plus Available Instant Discounts on ACDelco Filters

Visit Roy Foss during August and September and receive a complimentary inspection of your Cabin and Engine Air Filter. If a replacement is required, you can receive a $5 instant discount on ACDelco cabin and engine air filters.

Offer valid from August 1, 2022 to September 30, 2022 at GM Canada Certified Service dealers. Customers who receive a no-charge filters inspection during the offer period will be eligible for an instant discount on new ACDelco cabin and engine air filters, $5 on each for a potential savings of $10. Instant discounts to be applied before applicable taxes. Customer must show proof of offer, via e-mail or, to be eligible for instant discounts. Customers applying instant discount to purchase of cabin or engine air filters must have them installed by the same dealer who completed the filters inspection. Discount can only be applied toward air filters installed on the same vehicle on which the no-charge filters inspection was completed. Offer available to retail customers only. Offer may not be combined with select Dealer specific incentives or promotions. GM Canada reserves the right to cancel, modify or amend the offer without notice. See dealer for details.

EXPIRES: 09/30/2022
Complimentary Foss Lifetime Tire Repair

Foss Life Time Tire Repair ImagePurchase a set of four (4) in-stock tires from Roy Foss and you will receive Complimentary Foss Lifetime Tire Repair!†

Complimentary Foss Lifetime Tire Repair offer is only applicable when purchasing four (4) in-stock tires from Roy Foss; rims, sensors, and installation not included. Foss Lifetime Tire Repair offer is only applicable on tire repairs for the purchased tires only and does not include rim damage or rim or tire pressure sensor replacement. Foss Lifetime Tire Repair offer is applicable on repairs involving installation of a tire plug/patch repair ONLY. It does not include tire replacement due to unrepairable tires (tread depth less than 2/32”, sidewall damage, damaged from mechanical failure, collision, off-road use, etc). Maximum claim is $49.95 before tax. Repairs must be completed at Roy Foss.

Senior's Day Every Tuesday
Receive 10% off service at Roy Foss! Contact us for details

Seniors Day Image

Senior’s Day offer applies to customers who are aged 65+ and is applicable on all vehicle repairs and maintenance items. All offers cannot be used on past purchases, cannot be redeemed for cash, and may not be combined with certain other offers. Please see Roy Foss for all offer details.


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Roy Foss Thornhill 43.802789, -79.422113.