Answers to your auto repair questions - Auto Repair Q&A and Online Car Manuals

Online Auto Repair Manuals

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Many hard bound, paper auto repair manuals can cost as much as $75 each. The good news is that auto repair has moved online making it quick and easy to use. Read More...

Click here to learn more about online auto repair manuals

Ask the Mechanic

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Have an auto repair question? Visit our Auto Repair Question and Answer section. Ask about engine repair, auto body work, engine maintenance, fuels and lubricants, driving techniques and anything else you need to know. Our auto experts will do their best to help you out, and so will the 10w40 community. Click on the button below to ask a question:

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Participate and Win! now features a points system. Registered users will automatically receive:

  • 10 points for answering a question
  • 5 points for asking a question
  • 1 point for voting on a question or answer

Benefits of participation:

  • members now decide for themselves which questions and answers are most relevant to the community
  • will periodically sponsor contests; participate to win!
  • Members who provide the most valuable input will become featured experts on

Auto Repair Question Categories

Has your question already been answered? Have a look at our archives to find out:

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Used Car Classifieds

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Online Used Car Classifieds

Search over 2 million used cars on Our used car classifieds section is powered by is much different from your "run of the mill" automobile portal. The portal contains reviews, good and bad, of dealers as well as reviews, good and bad, of the vehicle you are looking at. Start Your Search Now...

Featured Auto Services

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Cheap Auto Insurance

Cheap Auto Insurance is in the business of educating insurance shoppers on the best way to save money on their auto insurance policies. With a comprehensive library on the various discount options you are sure to discover tips you could use to start saving money today.

Featured Auto Repair Topics

Featured Auto Problems Topics

About Us

There are a lot of good online auto repair web sites with individual articles that can answer your questions.

We're collecting all the individual resources in one place and sorting them by type of problem or project. You can find all the free auto repair advice you need by checking 10w40's huge database of auto repair topics and parts suppliers from across the web.

So what kind of online auto repair help will you find at the 10W40 web site? We have collected resources on all sorts of auto repair and car maintenance topics, such as how to change transmission oil, the best way to bleed brakes, why a car might stall or be hard to start, or even how to drive a stick shift car. We're also looking for experts who like to show off their car care knowledge to answer questions in the Q and A area.