Not uncommon for them to leak a little. A leaking rear seal can leave a big mess and have minimal effect on the engine oil consumption.
Be sure the engine oil is not overfull, as in overfilled or contaminated with gas.
It can also be the front transmission seal.
I have greatly slowed rear main seals by running the oil below the full mark. As long as you know the oil consumption history, running it low will not hurt it.
A leaking rear seal is often a symptom of more serious problems like loose main bearings and excess blow-by. A restricted crankcase breather will also increase crankcase pressure. Only replacing the seal may be a temporary fix or no improvement at all if the engine is getting tired.
If you do go in to repair it, while there it would be a good time to replace the front transmission seal. If it has a dual clutch it will have 2 seals.
Also look up top. A leaking valve cover gasket can sneak it's way down and appear to be a rear seal.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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