I wrote this article in 2008. I hope it helps you to get your auto in shape for the summer driving. The following suggestions should help your autos run 
more efficient and prevent costly breakdowns. 
I am often ask how to 
protect your auto? Most want to know what they can do to get the most out of their autos. First, I recommend  you change your engine oil regularly. I would increase the viscosity of my oil at least for summer 
driving. I personally use the higher viscosity oil in my autos 
year round. 
I know what many are thinking? What is oil viscosity? Viscosity is simply the oil’s resistance to 
flow at a given temperature, usually we refers to viscosity as the 
thickness of the oil. The lower the viscosity rating or weight, the oil is thinner. The higher
 the viscosity rating, the oil is thicker. Some oils are also 
multi-viscous, which means the oil's thickness can change depending on 
its temperature. Multi-grade oils offer better engine protection than 
straight weight 
oils by preventing the oil from becoming too thick when cold, while 
maintaining a heavier oil weight when hot. The 
oil still thins out with heat, and thickens up as it cools, but at any 
given temperature it should measure within the specs for a weight oil 
at that temperature. 
We need to discuss 
synthetic oils. As a usual rule, conventional oils lack the performance 
of synthetic oils 
in the 
areas of low-temperature performance and high-temperature oxidation 
stability. The synthetic oils do offer more protection. I personally 
like the synthetic oils. The synthetics seem to offer more protection 
for our engines. I recommend you follow your owner’s manual.
How do you know which type of oil  to use in your 
auto? Your vehicle's owner's manual will list the manufacturer's oil 
recommendations. Many late model autos recommend oil grades of 0W-40, 
5W-20, 5W-30. The owners manual should tell you what grade of oil to use
 in different climates, and temperatures. 
Our
 transmissions are often overlooked. It is important to service your 
transmission. I recommend changing the fluid and filter the old fashion 
way.  Service according to your owner manual, hard 
winter driving can be hard on a transmission. Many transmission problems come from 
overheating. We often overheat our transmissions when we tow heavy 
objects and continuous stop
 and go traffic. Winter driving in snow can overheat 
the tranmission especially rocking the vehicle 
from the snow when one gets stuck.  The transmission fluid burns, at 
higher temperatures causing it to losing its 
lubricating quality. The fluid becomes oxidized leaving deposits all 
over 
inside the transmission. Not changing the fluid, too little fluid, using wrong 
type of fluid, sooner or later, 
this will results in transmission failure.
The Coolant or 
antifreeze mixture is essential to keeping your engine protected.  The 
mixture of 
coolant and water inside your radiator needs to be a 50:50 mixture of 
antifreeze and water. This is important to protect your engine. During 
freezing winter weather too little antifreeze can put your engine and 
the components of the coolant system in danger of freezing and cracking.
 The hot summer heat can cause an auto with low coolant to overheat. 
Water boils at 212 degrees Fahrenheit. When you combine the water with 
an equal amount of antifreeze, the new mixture boils at a higher 
temperature. The coolant also adds some protection to hoses and prevents
 some rust and corrosion. The coolant system needs to be flushed every 3
 years or less depending on the PH of your coolant.
The belts and
 hoses 
are also essential to the operation of 
the engine. The belts and hoses  during the winter months are 
subject to hot and cold temperature fluctuation. The summer heat is 
also hard on belts and hoses check the belts and hoses. I recommended having them checked 
before leaving on a summer vacation if you are driving. If they break, 
you can be strand on the side of the road in the hot summer heat. 
The
 battery
 is next on our list. The winter is 
tough on your battery. I recommend a high cold cranking amps battery.  
Battery's are rated by CCA, cold cranking amps. This term is used to 
    define a battery's ability to start an engine in cold 
    temperatures. The rating is the number of amps a new, fully 
    charged battery can deliver at 0° Farenheit for 30 seconds, 
    while maintaining a voltage of at least 7.2 volts, for a 12 volt 
    battery. The reason I suggest a high CCA rating, is because higher 
the CCA rating greater is the starting 
    power of the battery.
Many are shocked to discover the 
hot summer heat is also hard on a battery. Hopefully, the following suggestions can help prevent you from being 
stranded on the side of the road. All batteries more than three years 
old should be 
tested since there is a higher rate of failing with older batteries. This 
is a good time to clean 
the posts and connections. They need to be corrosion free. I recommend 
that you always carry jumper cables. The red is always put on the 
positive post (+) and the black cable is put on the negative (-).
This
 is also a good time to check all fluids. Let's not 
forget rear-end and other parts that need to be check for gear oil. See 
your owner manual for types and level of fluids in each system. I feel 
like I need to interject here. It is extremely important to fill to 
proper levels of fluids and use proper filters.
The next item we are going to address is 
 tire
 pressure. It is vital to have properly inflated tires. Read your 
owner's manual if available, check driver’s door, or glove box to find 
the correct tire pressures. The tire pressure specifications are for 
when the tires are cold. Therefore be sure to check the pressure when 
the tires are cold. This means before the auto has been driven. Improper
 air pressure may lead to an accident. There are other reasons the 
correct tire pressure is important. It provides the optimal contact 
between the road and your tires. This helps your tires wear properly 
which extends the life of the tires greatly. Proper inflation also 
improves your fuel mileage. Your summer tire pressure may need to be 
adjusted to compensate for hotter operating conditions. Do remember to 
check your spare tire’s pressure bi-monthly especially before trips. 
We need to be able to see thus wipers and wiper fluid
 are
 the next are to check out.
 The wiper blades need to be 
changed once a year. The reason is because the blades can dry out; when 
this happens they need to be replaced. The wipers can start separating 
the rubber can separate from the wiper. This can scratch your 
windshield. Now that we have change the wiper blades, lets check and 
fill the wiper fluid. This is especially needed for the summer with the 
increase in bugs, pollen, and dust. Not that our wipers are new and we have fluid lets 
clean
 the windshield
. I recommend clean windshield, grille, 
hood, headlights, and bumper at least weekly. Bugs flying into our auto 
can damage the paint. The headlights on our autos need to be cleaned and
 polished for summer driving. At this time, check to see if all you 
lights are functioning properly. 
We are ready for summer driving. I do recommend an emergency kit for 
the trunk. The following items are suggested. I keep them in my trunk.
 A First-Aid kit,  A Flashlight, Extra Batteries, 
Triangle Reflector Kit, Working Gloves, a Change of Clothes, including 
Walking Shoes, Dried Fruit, Nuts, or other Non Perishable Food, Bottle 
Water, Sport Drink, Hand Sanitizer, Paper Towels, Clean Towel, Jumper 
Cables, A Gallon of Antifreeze, Duct Tape, Wire, Electrical Tape, Green Slime Sealant for Tires, and A few Hand Tools. These items 
can come in hand if you are stranded on the side of the road.
In 
conclusion, the 
above maintenance if done properly should extend the life of your auto. 
Changing oil, transmission fluid, checking belts and hoses, and checking 
coolant are the first step to 
ensure your auto will last many years to come. I hope everyone enjoys the rest of spring and the upcoming summer.