Rich Posted February 18, 2014 Report Share Posted February 18, 2014 Good morning, I'm using mogas 93 octane, E10 with Aero Shell Sport +4 in a 912 ULS and have 43 hours on the oil. Due to the nasty wx here in the north east I've only been able to put 2 hours on the plane over the winter. Calendar time is going on 8 months. Aircraft is now in an unheated hangar with 200 Watts of heat on the engine. 100w on the oil tank and 100w on the bottom case In this situation is it okay to wait to the 50 hour oil change or should the oil be removed ASAP? Link to comment Share on other sites More sharing options...
Anticept Posted February 18, 2014 Report Share Posted February 18, 2014 You are fine. If you ran 100LL i might say "do what makes you comfortable". Link to comment Share on other sites More sharing options...
FastEddieB Posted February 18, 2014 Report Share Posted February 18, 2014 My take is you'd probably be fine waiting for the normal 50 hours. But whenever I think or type the word "probably", I take pause. Along the lines of taking "The Most Conservative Action", I'd just go ahead and change it. The risk is probably infinitesimal, but you've already gotten about 86% of your scheduled hours out of the oil, so the incremental cost is tiny. Link to comment Share on other sites More sharing options...
S3flyer Posted February 18, 2014 Report Share Posted February 18, 2014 So what bad things can occur based time? Link to comment Share on other sites More sharing options...
FastEddieB Posted February 18, 2014 Report Share Posted February 18, 2014 I think acids build up in the oil, making it a poorer lubricant, but I'd have to Google it. Link to comment Share on other sites More sharing options...
Anticept Posted February 18, 2014 Report Share Posted February 18, 2014 I think acids build up in the oil, making it a poorer lubricant, but I'd have to Google it. This is less with mogas than with 100LL. The other part is oxidation. That's why I said he is fine, but if he ran 100LL, I'd consider it. Link to comment Share on other sites More sharing options...
Rich Posted February 18, 2014 Author Report Share Posted February 18, 2014 Thanks for the feedback Link to comment Share on other sites More sharing options...
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