I've data-logged my motor substantially, i've got engine oil temp as one of my inputs to the EFI computer. Before hardblocking the engine the oil would sit at about 100*C (212*F) on local street driving, after an extended drive on the freeway, would creep up to about 110-115*C (230-240*F) then cool back down when the rpm dropped. After hardblocking the temps rose about 20*C everywhere, so I put an oil thermostat (85*C) and an oil cooler on the car, now the oil is at basically 95*C-105*C everywhere.
IMO, unless you're grout filling the block, move along, nothing to see here. You want the oil to get up to temperature otherwise you'll be changing it every 3000miles.
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'71 Holden HQ Monaro - 3850lbs race weight, 400c/i - 11.4 @ 120
'66 Pontiac GTO - 389, 4 speed street cruiser
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