2-stroke engines are lubricated by their own fuel mix. There's no reason you can't mix oil and gas in a 4-cycle fuel mix. This is what the Stihl 4-cycle chain

2-stroke engines are lubricated by their own fuel mix. There's no reason you can't mix oil and gas in a 4-cycle fuel mix. This is what the Stihl 4-cycle chainsaw does. Honda also makes small 4-stroke engines that work in any position, because Japan is awesome.