Dear Motor Medics,
I’m having a problem with my lights on my 2000 Ford Taurus. Both the front and rear lights have water in them. The rear looks like a bathroom mirror after a hot shower on both sides and the front has water collected towards the bottom of the driver side headlight. When the weather is dry for long periods they will clear up, but if I wash the car or it rains once they fog right back up. The bulbs themselves seem to be working ok and this has gone on for a couple of years. What can I do to fix this? I just don’t like the way it looks.
Doug in Clarksville Tennessee

Dear Doug,
Many vehicles have this issue. The moisture comes from the seal around the plastic lens leaking where it’s bonded to the inside light reflector housing. During hot sunny days the heat generated by the sun will break down the seal and moisture will occur. In some cases, the lens will separate completely from the reflector. We have seen people try many things to repair their existing lights but usually the most effective fix is to replace the assembly. Check several places for the best deal. Auto recycling facilities, the dealer, and auto parts stores usually carry the assemblies. Once you find a good light at a reasonable cost, you could possibly install them yourself. You will want to have the front aimed by a professional though.
Take care, the Motor Medics

Dear Motor Medics,
I have a 2001 Ford F150 and I would like to know more about using synthetic oils in order to extend the life of the truck and increase fuel mileage. Am I on the right track here? Can I expect to see a big increase in mileage if I switch to all synthetics and is there a risk that I might damage something by switching now after 150,000 miles using regular oils? I have changed the fluids according to the manuals severe service ratings on time ever since I purchased the truck new.
Mark in Fargo North Dakota

Dear Mark,
You can switch all the fluids over to synthetics but don’t expect a huge gain in mileage. If you have all conventional oils now and were to change everything in the drivetrain over, you may see a slight increase in the highway mileage, and you will help extend the life of any parts that are not already worn severely. The oil itself should not hurt your vehicle but you must stick with the factory approved type. On some older vehicles changing may result in leaks. Consult with your dealer to be sure. Synthetics don’t break down as fast as conventional oils and they hold their viscosity more consistently which is the main boost for the mileage. Changing over to synthetics can be expensive so if you do it you may want to change one at a time when that service comes due.
Take care, the Motor Medics