Mobil 1 0W40, Motul 8100 0W40, Redline 5W40?
Scenaro: 1991 Rover 3.9 V8, 78k miles, poor oil history (very light sludge), owned since 70k miles, driven on the Gulf of Mexico (hot). Current oil: Mobil 1 0W40 - OCI 5k miles (K&N 3001 filter) - I always liked the idea of instant flow on a cold-start. It's in my Range Rover Classic. Good engine, and I want to keep it that way.
I've been keeping an eye on oil tech since the first Mobil Synthetic - please, no "My Honda Civic runs sweeeeet on....". I'm considering a change of oil... What's the best of the above mentioned oils? Bare in mind that although this is a low compression, low performance (flat torque curve) engine, I've had four of them and they run high cylinder head/exhaust manifold temps and are prone to wrecking oil. This will be no exception as it has to idle off-road in 100F+ ambients.
Scenaro: 1991 Rover 3.9 V8, 78k miles, poor oil history (very light sludge), owned since 70k miles, driven on the Gulf of Mexico (hot). Current oil: Mobil 1 0W40 - OCI 5k miles (K&N 3001 filter) - I always liked the idea of instant flow on a cold-start. It's in my Range Rover Classic. Good engine, and I want to keep it that way.
I've been keeping an eye on oil tech since the first Mobil Synthetic - please, no "My Honda Civic runs sweeeeet on....". I'm considering a change of oil... What's the best of the above mentioned oils? Bare in mind that although this is a low compression, low performance (flat torque curve) engine, I've had four of them and they run high cylinder head/exhaust manifold temps and are prone to wrecking oil. This will be no exception as it has to idle off-road in 100F+ ambients.