At the risk of sounding stupid, when should I engage the overdrive in my
No. Read the owner's manual, follow the recommendations in there.
You should leave it on almost all of the time. If you are towing or in very hilly terrain you may find that the transmission is shifting excessively. In those cases, you may want to disengage the overdrive to lessen the amount of shifting until you are on flatter terrain.
Basically, leave in on unless there is a good reason not to.
Stephen
leave it on unless you are towing.
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