what oil viscosity 3.0l engine
run 10w30 or10w40 eather is ok.
I believe factory spec may be 5W30 for fuel economy, but as papa says, any 10W30 or 10W40 should be fine depending on the conditions (temps) you drive in.
Do NOT run 10W40 motor oil in a modern vehicle, to include any American manufactured vehicle from late 1980's to present. The last American made vehicle to allow 10W40 was built in the mid 1980's. 10W30 is the heaviest oil for anything newer than that any American vehicle's engine should use. The only vehicle manufactured recently that still allows 10W40 oil is manufactured by Kia motor company or diesel trucks which may use 5W40, 10W30 or 15W40 oil. The most recent vehicles other than Kia use 5W30 as the heaviest weight oil allowed. The other weights used in current model vehicles are 5W20 0W30 and 0W20.
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