In comparing log splitters beware of advertising hype.There are a few things that are common to all splitters under $2000.00.
They all use Barnes two-stage pumps, exception will be the super cheap ones may have a MTE brand pump.
The common bore sizes are 4", 4.5", 5",3.5"in the cheapest models. 6" bore cylinders are extremely rare and never found in a splitter for the residential market.
Maximum tonnage ratings without damaging components are 4" bore 20 tons ,4.5" bore 24 tons ,5" bore 30 tons ,these figures are optimum and almost impossible to attain.
Pumps will be 11,13, or 16 GPM. Larger 22 and 28 GPM pumps will not be found on splitters under $3000.00.
Two-stage Barnes pumps require a minimum HP. to operate at full capacity.
11 GPM req.5.5 HP.
13 GPM req.6.5 HP.
16 GPM req.8 HP.
Larger HP. engines WILL NOT provide any more speed or tonnage. They only add to cost and consume more fuel.
When it comes to engines Honda GX horizontal are best followed by Robin-Subaru then Briggs. Horizontal engines are generally better than verticals.
When it comes to highway towing if the splitter does not come with suspension it is unsafe at speeds over 30 MPH.