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Hi, We just bought a 2015 Rav4 AWD Limited with 33000 miles. I went under the vehicle, after 2 weeks of usage, to investigate a noise coming from the suspension or direction (cracking noise when stopping and starting). I noticed a small amount of oil underneath a gasket (pictures). I removed...

I have an almost 10 year old (90,000 miles) 2010 Limited RAV4 with 4x4. I've never really used the 4x4 mode before. My pickup truck friends told me I should be running it in 4x4 at least once a month (never heard of this but makes sense). Should I even bother at this point after 10 years...