Family Owned - Local

2016 Small Business of the Year
Business to Consumer Recipient

We specialize in auto repair, auto sales, oil changes, preventative maintenance and repair of your vehicle. We service vehicles near Rib Mountain, Rothschild, Schofield, Wausau, Weston and Mosinee. We are conveniently located in Weston and Wausau, Marathon County, Wisconsin.



What is the Proper Grade of Gas

Proper Grade of Gas

There are a lot of misconceptions about fuel grades – and by fuel grades I mean the octane rating. With names like “Standard," “Super," “Plus," and “Premium,” it’s no wonder that people associate the octane rating/grade with quality. Octane ratings are expressed as a number that typically ranges from 87 to 91 at the pump. The number does not mean “better” but rather signifies the appropriateness of a particular grade of fuel for a particular engine.

Octane is a measure of gasoline’s ability to resist igniting before the spark plug goes off. Gasoline and air are compressed in the engine’s combustion chamber. When the pressure reaches a certain point, the gas will spontaneously combust. You don’t want that to happen; you want the spark plug to ignite the fuel at precisely the right time. When the gas combusts prematurely, the piston will try to go down while it is still being pushed up by the crank shaft and you will hear a pinging or knocking sound. That sound is metal stuff banging into other metal stuff when it’s not supposed to. As you can imagine, this can lead to expensive damage.

Because engines have different designs, they have different compression ratios. An engine with a higher compression ratio needs gasoline with a higher octane rating to prevent premature combustion. Also, turbocharged or supercharged engines have higher pressure in the engine and often require higher octane gas. The bottom line is that your vehicle has a recommended octane rating – often on a sticker in the gas cap area – and you should always use at least the octane number recommended. Using a lower octane rating than recommended could cause engine damage. Using a higher octane rating than recommended will not have any discernable power or efficiency benefit in modern engines.

Now, just because the octane number doesn’t measure quality, that doesn’t mean there isn’t a quality difference in gasoline. The government mandates that all gas have a minimum level of detergent added to keep the engine and critical fuel system and emission components clean and operating efficiently over the long haul. Top tier gasoline will have many times the minimum level of detergent. To give you an idea of how important that is, all U.S. automakers use top tier gasoline in their government mandated 100,000 mile durability tests. Good quality fuel is critical to long life of engine components.

No matter what kind of gasoline you use, there will be some carbon build up on your valves, pistons, fuel injectors, etc. This is especially prevalent on the intake valves of the GDI (gasoline direct injection) engines that are found in more and more vehicles because the gas is injected directly into the combustion chamber and the detergents in the fuel do not wash over the intake valves. A professional fuel system cleaning is needed to clean and restore the efficiency of your fuel system and to keep your fuel economy up.

Ask your Service Advisor at Griesbach Auto Service INC. if it’s time for a professional fuel system cleaning.

Griesbach Auto Service INC.
5910 Mesker Street     4302 Stewart Ave
Weston, WI 54476       Wausau, Wi. 54401
715.355.1553               715.203.8808

COVID-19 Update

We are here for you

Dear Clients

The health and safety of our employees and community is our highest priority. We are closely monitoring the guidance of the World Health Organization and Center for Disease Control and Prevention regarding the coronavirus (COVID-19).

Griesbach Auto Service is actively implementing various procedures to ensure we meet clients needs while doing our part to keep you, our employees, and our communities safe. We continue to offer online scheduling, free pick up and delivery, loaner vehicles, night drop box, digital inspections, and text to pay invoicing. With these services, you can have your vehicle serviced at this time without any face to face contact with our employees or other clients. This will drastically reduce any chances of spreading a virus.

In addition to our standard health and safety practices which we already maintain, we have added a few other precautions, including:

• Increasing the frequency of cleaning and sanitization in all of our offices, loaner vehicles, and service centers.
• Ensuring the safety of our employees through prevention education, early detection of symptoms, encouraging them to stay home when ill, and reinforcing best practices.

Our Service Departments remain open for business, and we are ready to serve you at either location and online at griesbachautoservice.com. If any changes to this occur, we will be sure to update everyone as new information becomes available.

Thank you for your trust in us,

Jon Griesbach

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