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Joe is ready for action!Manufactures have come up with suggested service intervals for maintenance which can be found in your owners manuals.  If your service interval is not available, Denny's Auto Diagnosis can print one out for you.  In addition to your owner's manual, there are often specific services that some vehicles need over others.  For instance, GM's 3.1, 3.3, 3.4 and 3.8 can be prone to fuel rail injector clogging.  It is recommended to have these systems flushed once every 30,000 miles to help prevent missfires.  Below is a list of common services done at Denny's Auto Diagnosis.

Engine Oil Change -- Engine oil is lasting longer with todays super clean running engines!  Service intervals are increasingly getting longer.  And, with the use of synthetic oils, you can go longer.  Denny's Auto Diagnosis features quality Mobil and Exxon oils.  Unlike the quick lubes, your oil change is performed by a well experienced ASE Certified technician.

Motor Vac MachineFuel Injection / Carbon Clean -- With todays emission standards, it is increasingly important to service your fuel system, combustion chamber and valve carbon build up.  Crank case vapors and exhaust gases are re-introduced into your intake plenums causing a build up of carbons that restrict needed flow.  Carbon build up on the throttle bore and plate often cause a sticking gas peddle.  Injector clogging is also an increasing problem as emission standards keep getting tighter and tighter.  Denny's Auto Diagnosis has the most aggressive system cleaning on the market.  This system does not simply push cleaner through like most services, but by disconnecting the pressure and return lines, we are able to flush the fuel rail cleaning out each injector screen.  Recommended service interval is at every 30,000 miles.

Engine Coolant / Anti-Freeze is subject to great temperature fluctuations going form sub-zero temps up to 230f degrees.  After time engine coolants breakdown and are less able to perform their functions lubricating parts, transferring heat, keeping seals supple, or preventing freeze damage.  You should check your owners manual for its recommended service interval and have serviced accordingly.  Also, note what type of fluid it needs.  Many coolants nowadays are contaminated by someone mixing the wrong coolant into the wrong vehicle.  When this happens, your cooling system must be completely flushed.  Lastly, your coolant should be checked for its PH Level.  Regardless of any recommended service interval, some systems may develop a corrosive charge that can eat away at your engine and heating systems vital components.  Have your fluid tested today!

Transmission Service -- The most common cause of transmission failure is heat damage.  After heating up and cooling down with every drive and park, your transmission fluid begins to break down and loose its qualities.   We recommend flushing your fluid out every 30,000 miles.  And, at 60,000 miles, we suggest flushing out the fluid and replacing the filter.

Brake Hydraulic Fluid is hygroscopic, meaning that it can absorb water.  Every time brakes heat up and cool down condinsation is formed and accumulates in you hydraulic lines.  The problem is that water is good at promoting internal corrosion that can damage calipers, wheel cylinders, master cylinders, and expensive ABS components.  Although many vehicle manufactures recommend periodic brake hydraulic system flushes to help prevent expensive repairs caused by corrosion, many do not.  Denny's suggest flushing your brake hydraulic system every 45,000 miles.
We can check for moisture contamination in your brake hydraulic system at the master cylinder along with a complete inspection of your brakes.

Cold temperatures affect many of your vehicle components.  Battery strength is reduced.  All electrical components are subject to higher electrical resistance in wiring, connections, or loads.  Engine oil thickens.  Tires lose about one pound per ten degrees.  Weak anti-freeze coolant may freeze if mixture is incorrect.

Michigan Avenue -- Lansing Capital City Of MichiganAs winter approaches a lot of our customers start to worry about the effects of winter on their car. One of the first things that come to mind is their battery. 
At every 15k service period, (15k, 30k, 45k, etc.), we can check your battery. It is run through a number of tests all of which give us an idea of its condition. If it fails any of the tests, we recommend a new battery.
However, we often find ourselves in a difficult situation, we want you to get as much life out of your battery as possible, but we also don't want it to fail and leave you stranded! There is no definitive way of knowing how much life is left in your battery. Some batteries last longer than you would think possible, 6-7 years, while others fail after only two years.
Some of the tests we use on batteries can point to a future problem - then we can tell you your battery is marginal. This, of course, is the best time to change your battery. We also suggest that even if your battery passes all our tests, but is over 4 years old then for your peace of mind it is wise to change your battery.
Changing the battery before it goes bad has another positive effect, a weak or marginal battery can cause your alternator (the generator that replenishes the battery) to work harder. When your alternator works harder it gets hotter and this can lead it to a shorter life expectancy. Alternators cost up to $400, even more for some imports, so it pays to have a good battery, and not put any extra strain on your alternator causing it to fail early.
We always recommend good quality batteries. We believe that Delco and Motorcraft have excellent reputations for long life.
So, when to change your battery? There is no hard and fast rule, but our tests help us to advise you when to change yours - before it leaves you stranded at the roadside!