Trust your vehicle maintenance to the experts!



Whether belts and hoses or fluid flushes, we do it all!



Our expert mechanics can help you change your brakes



Read why our customers love us.


Auto Doctor Unlimited Offers Auto Repair Services You Can Count On!

Auto Doctor Unlimited is the automotive expert in Algonquin, IL 60102. Since, 1992 we've provided the Algonquin area with reliable, affordable automotive maintenance and repair services including 4x4 Services, Brakes, Car & Truck Care, Domestic Cars & Trucks, Electric and Hybrid Vehicle , Electrical Services, Electronic Services, Engine & Transmission, Engine Maintenance, Expired Warranty Care, General Services, Heating and Cooling Services, Ignition Interlock Systems , Import Cars & Trucks, Inspections and Emissions, Miscellaneous Services, Quick Lube Services, Tires, Towing, Transmission Services and Undercar Services.

We have experience servicing all makes and models of domestic and import vehicles, and we're honored to keep vehicles throughout the Algonquin area reliable and well-maintained. Our skillful mechanics will take great care of your vehicle too, quickly diagnosing any problems and offering cost-effective solutions to get you back on the road.

Call Auto Doctor Unlimited today at 224-241-8686! You can also send us an email. Either way, we're looking forward to providing you with reliable automotive service!

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    Areas We Serve

    Vehicle Tips

    According to recent studies, 5 percent of all motor vehicle fatalities are clearly caused by automobile maintenance neglect.

    The cooling system should be completely flushed and refilled about every 24 months. The level, condition, and concentration of coolant should be checked. (A 50/50 mix of anti-freeze and water is usually recommended.)

    Never remove the radiator cap until the engine has thoroughly cooled. The tightness and condition of drive belts, clamps and hoses should be checked by a pro.

    Change your oil and oil filter as specified in your manual, or more often (every 3,000 miles) if you make frequent short jaunts, extended trips with lots of luggage or tow a trailer.

    Replace other filters (air, fuel, PCV, etc.) as recommended, or more often in dusty conditions. Get engine drivability problems (hard stops, rough idling, stalling, diminished power, etc.) corrected at a good shop.

    A dirty windshield causes eye fatigue and can pose a safety hazard. Replace worn blades and get plenty of windshield washer solvent.

    Have your tires rotated about every 5,000 miles. Check tire pressures once a month; let the tires cool down first. Don't forget your spare and be sure your jack is in good condition.

    Check your owner's manual to find out what fuel octane rating your car's engine needs then buy it.

    Keep your tires inflated to the proper levels. Under-inflated tires make it harder for your car to move down the road, which means your engine uses more fuel to maintain speed.

    Lighten the load. Heavier vehicles use more fuel, so clean out unnecessary weight in the passenger compartment or trunk before you hit the road.

    Use the A/C sparingly. The air conditioner puts extra load on the engine forcing more fuel to be used.

    Keep your windows closed. Wide-open windows, especially at highway speeds, increase aerodynamic drag and the result is up to a 10% decrease in fuel economy.

    Avoid long idling. If you anticipate being stopped for more than one minute, shut off the car. Contrary to popular belief, restarting the car uses less fuel than letting it idle.

    Stay within posted speed limits. The faster you drive, the more fuel you use. For example, driving at 65 miles per hour (mph) rather than 55 mph, increases fuel consumption by 20 percent.

    Use cruise control. Using cruise control on highway trips can help you maintain a constant speed and, in most cases, reduce your fuel consumption.

    Keep your engine tuned. A fouled spark plug or plugged/restricted fuel injector can reduce fuel efficiency as much as 30 percent.

    Inspect the engine's belts regularly. Look for cracks or missing sections or segments. Worn belts will affect the engine performance.

    Have the fuel filter changed every 10,000 miles to prevent rust, dirt and other impurities from entering the fuel system.

    Change the transmission fluid and filter every 15,000 to 18,000 miles. This will protect the precision-crafted components of the transmission/transaxle.

    Inspect the suspension system regularly. This will extend the life of the vehicle's tires.

    What Our Customers Are Saying

    -Ed G.

    First time there. The owner was very friendly, gave me a deal and my car was done quickly. I didn't feel pressured to buy anything else, like you experience at most places. It might have taken a little longer than ten minutes, but I felt very confident leaving that my car serviced properly.

    -Korey S.

    Went there because of an oil leak and they gave me a new cap and drained out all of my old oil and gave me new oil at no cost at all! These guys are great people!

    -Cindi J.

    Good service. Been going here for years. Always polite and will talk to you before doing anything you haven't asked for.

    -Rita H.

    Great service and SO Fast!

    -Miki K.

    Fast...10 minutes in and out. Great service great hospitality good price. Mechanic on duty. Very clean. You don't need an appointment.

    -Schulenburg Realty

    Been here many times throughout the years. Just stopped here for an overdue oil change before heading to a real estate closing and they got me in right away. Still quick and professional after all these years! Highly recommended. Coffee has improved since I first started coming here.

    -Bruce F.

    The service is always very good. I have been to other lube businesses and this one is the best. The main reason are the employees. They are always quick, courteous and the job is done right.

    -Debbie K.

    Really listened to me about what was going on with my car. We discussed what could be wrong. Called me right away with what he found and explained what he did.

    -Ray R.

    I have used Auto Doctor to do brakes, tires, and wheel bearings. His prices were the best around and his work has stood the test of time. I highly recommend Auto Doctor. I have found them to be fair, honest and reliable. I finally found a decent auto mechanic!

    -Jay C.

    This guy is really very very fair on his prices and he does great great work. He is the only place I will take my vehicle to to have work done to it.
    AAA (American Automobile Association)
    ASE (Automotive Service Excellence)
    Car Care Aware