Catalyzes the terminal (at the omega-position) hydroxylation of a fatty acid. Probably involved in alkane metabolism. Has minor activity toward myristic acid, palmitic acid, palmitoleic acid and oleic acid. an omega-methyl-long-chain fatty acid + O2 + reduced [NADPH--hemoprotein reductase] = an omega-hydroxy-long-chain fatty acid + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (9Z)-octadecenoate + O2 + reduced [NADPH--hemoprotein reductase] = 18-hydroxy-(9Z)-octadecenoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] hexadecanoate + O2 + reduced [NADPH--hemoprotein reductase] = 16-hydroxyhexadecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (9Z)-hexadecenoate + O2 + reduced [NADPH--hemoprotein reductase] = (9Z)-16-hydroxyhexadec-9-enoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Up-regulated when grown on alkanes as sole carbon source. Belongs to the cytochrome P450 family.