Courtesy Auto Repair Plus Guide to Using the Correct Fluids in Your Vehicle
November 29, 2017
Today's Courtesy Auto Repair Plus post focuses on using coolant.
If you pour in the wrong kind, it won't protect the cooling system and may even void the warranty. Check your vehicle owner's manual. Of course, your Courtesy Auto Repair Plus service advisor will know the proper coolant for your vehicle.
Brake fluid is confusing for some Tiffin drivers. Back when we opened Courtesy Auto Repair Plus, most vehicles used Dot 3 brake fluid. Now we have Dot 4 and Dot 5. Some Tiffin residents mistakenly think the higher numbers are an upgrade. You know, if 3 is good then 4 must be better. That's not how it works. They are different formulations to meet the demands of differences in brake systems. Only one of them is designed for your vehicle.
Ditto for transmission fluid. For decades there were two basic types of tranny fluid used at Courtesy Auto Repair Plus: friction modified or not. With the tremendous engineering advances in vehicle automatic transmissions, there have been several new types of fluids developed to protect and lubricate them.
Nowhere are the advances in automotive fluids more evident to Courtesy Auto Repair Plus professionals than in motor oil. Many new weights and formulations have been created to meet the demands of today's high-tech vehicle engine design. Modern engines have more parts and much tighter tolerances.
That's where the new grades of engine oil come in. They have to be formulated to lubricate, protect and clean all of those vehicle engine parts, big and little. The oil has to be thin enough to get into little passages, yet resistant to vaporization.
At Courtesy Auto Repair Plus in Tiffin, we believe that in some ways modern automotive fluids are just as impressive as the new engines. Because weights of oil and types of coolant and transmission fluid are so carefully matched to the vehicle, make sure you always use the proper fluid if you are topping off at home.
Courtesy Auto Repair Plus
967 Bon Air Ave
Tiffin, Ohio 44883
419-443-0797
http://www.courtesyautorepairplus.com
More articles from Courtesy Auto Repair Plus

A Clean Start (Battery Cleaning)
November 30, 2025
You may be fanatical about keeping the outside of your vehicle clean. But what about what's under the hood? Have you ever thought about how dirt and grime may be affecting your engine's components? One of the most important parts under your hood to keep clean is your vehicle's battery. With a d... More

Getting Off to a Running Start (Starter Replacement)
November 23, 2025
When you start your vehicles engine, theres another motor that makes that whole process possible. Its called the starter, and its a small electric motor that gets your vehicle running. As you can imagine, its quite a chore for a little electric motor to turn over the big engine that powers you... More

Knowledge is Power (Battery Testing)
November 16, 2025
Its likely happened to you once or twice. You head to your vehicle, open the door, turn the key and lo and behold, your battery is dead. Now youre stranded, may have to get a jump or a tow, and youll definitely be late for wherever you were headed. While your vehicle may sometimes give you warni... More
