Two problems related to engine oil leaking have been reported for the 2018 Mazda CX-5. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Mazda CX-5 based on all problems reported for the 2018 CX-5.
When taking vehicle in for recommended 45k mile service, dealer discovered warped head cylinder and leaking oil. No check engine light warning ever came on! no warning. Mazda is replacing engine parts under vehicle warranty.
2018 Mazda Cx-5 when I check the oil it is extremely over full and strong odor of gas when the dipstick is pulled out to be wiped off. It is like 4 inches above the max mark/ oil is very thin. This is an excessive amounts of gas in there. I warm up my car before leaving and drive it regularly everyday. This is very bad I read that gas is not a lubricant and washes the oil out of where it needs to be lubricating engine. It continues to happen. Checked manual to make sure I am checking it correctly. Says to get to operating temp. Wait 5 min to let oil settle back into engine then check it. I contact Mazda corps again, they have me take car to vallejo to inspect it with their regional technical specialist, then leave it there for repairs. During this inspection we discover oil leaking from the rear main seal. Their specialist confirms where it is leaking. I leave my car 5 days. Then they call me to pick it up to take it to hansel Mazda in santa rosa. Before I drop it off for repairs I have the oil changed at hansel Mazda. Then a few days later I check the oil, again it is extremely over full with strong odor of gas. I take it to hansel Mazda to have it checked to confirm that this is happening and make app to have the oil leak that was confirmed by Mazda's specialist and this problem of gas getting into the oil fixed. I check oil before dropping it off at hansel, it is way over full and very thin. Drop it off, they keep it for 5 day too then say there is no oil leak and nothing wrong with my car. They said they did anything to my car except inspect it. It is running different. I check oil next day it is very thick and very low at the minimum mark on dipstick. The oil has never read this low on the dipstick hansel Mazda must have taken a lot of oil out to counter for all the excessive amounts of gas getting there and added something to try to seal the leak. They lie.