Table 3. Statistically significant differences in average consumption (l/1000 m³ ub) between contractors and forest companies.

	Contractors			Forest companies
Harvesters	Consumption	Std. Error	N	Consumption	Std. Error	N
Hydraulic oil	28	4	41	40	3	49
Transmission oil	2	0.8	34	5.7	0.8	39
Chainsaw oil	20	2.3	40	42	7	43

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