If you want a Harbor Freight Predator generator, you'll want to make sure you know which oil to use for peak performance no matter the time of year.

The Predator 3500 from Harbor Freight is a popular and highly rated generator, but just like any product, a few users have reported problems with it.

We've tested and reviewed products since 1936. Read CR's review of the Predator 57063 generator to find out if it's worth it.

The Predator 9,500-Watt Generator is purpose-built to handle the power draw of restarting the air conditioner while sustaining the lower load as your house cools down.

If you're looking to power your RV while on the go, Harbor Freight's 30AMP Predator Parallel Kit has plenty of juice. Here's how the generator works.