Hello every one I have a question I hope you can help with. The organization I work for has over 200 stand by generators for our communication sites. Some of the last sites we have completed have generators with ether the 2.4L or 3.0L John Deere with the air cooler for the intake air on the turbo. At this point I have about 14 of them that are dripping oil from the draft tube. The oldest of this set of generators only has about 80 hrs on it. I am trying to find out is this something that is acceptable. I have many other older units with the same engine and 300 hours and there is no sign of any oil drip. The only difference I see is the older units do not have the air cooler on the turbo. Now when I say dripping oil it is not pouring out while the engine is running but they lose about a spoon full per month. Dose any one have any dealings with this problem?