Mazda 3 2005 oil leak
 

Hi, I have a 2005 mazda 3 hatchback, recently i have noticed oil over the gearbox, it doesnt seem like motor oil because its not that thick(but im not sure). I took the car to the dealer last week. they checked it for 30 min and couldnt find the leak, so they told me to wash the engine and come back ..after that they kept the car running for 1 hour then took it for a drive for 30 min then checked the engine and the car's under again and there was no oil ..so they told me that there is no leak and that oil must have been spelled during an oil change. Now, the problem has came back today after going for a trip of about 100 miles.

Do you have any idea what could be the cause !?

thank you in advance



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