Hey guys. A friend just picked up a new jetboat that has a fresh 454 with stock crank and cam, mostly stock but may upgrade w/performance parts in the future. The boat will be used on flat water in northern california and hits very high speeds/rpm. There is no engine owner's manual and being that it's a custom setup there is no spec sheet with oil requirements. That said, let the recommendations fly! Thanks.
Oil recommendation please- jetboat w 454
- Thread starter Lightman
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My guess would be 20w50 or 15w50.
15w40 would most likely work as well. Mobil 15w50 is probably where I what I would ultimately use.
Without a doubt I'd definitely go with Mobil 1 15W-50 silver cap. It was designed with flat-tappet, high-performance engines (like the 454) in mind. The cost is also reasonable at about $21 for a 5-quart jug at Wal Mart.
From Mobil's website:
"Mobil 1 15W-50 is formulated with SuperSyn, an extra-high viscosity synthetic fluid, plus extra anti-wear additive to provide extra protection for severe service applications such as towing, hauling and racing. Mobil 1 15W-50 is recommended for high performance vehicles including turbocharged and supercharged engines where a thicker oil film is desired.
Mobil 1 15W-50 is also recommended for older valve train designs that may benefit from a higher level of anti-wear normally not required for newer generation vehicles. Mobil 1 15W-50 will also provide better anti-wear protection for higher valve spring tensions in certain racing engines."
From Mobil's website:
"Mobil 1 15W-50 is formulated with SuperSyn, an extra-high viscosity synthetic fluid, plus extra anti-wear additive to provide extra protection for severe service applications such as towing, hauling and racing. Mobil 1 15W-50 is recommended for high performance vehicles including turbocharged and supercharged engines where a thicker oil film is desired.
Mobil 1 15W-50 is also recommended for older valve train designs that may benefit from a higher level of anti-wear normally not required for newer generation vehicles. Mobil 1 15W-50 will also provide better anti-wear protection for higher valve spring tensions in certain racing engines."
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If you have adequate cooling water flow, I don't see why you would need an oil in the SAE 50 range.
I recommend this:
Amsoil Marine and Diesel 15w40
Also look at a couple 10W-40's:
Amsoil Marine 10W-40
Amsoil HD 10W-40
If you want to run a 20W-50:
Amsoil HD 20W-50
Amsoil S2K 20W-50
I recommend this:
Amsoil Marine and Diesel 15w40
Also look at a couple 10W-40's:
Amsoil Marine 10W-40
Amsoil HD 10W-40
If you want to run a 20W-50:
Amsoil HD 20W-50
Amsoil S2K 20W-50
I agree with the 15-40 or something like the Rotella 5-40 if you want synthetic. Jet outdrives do not load an engine much, other than the high RPM, they are pretty easy duty.
Pablo - How does a person decide between using the 10W40 Marine and Diesel oil or the 10W40 Marine oil? Do you have the ZDDP and Detergent levels of each oil?
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Originally Posted By: another Todd
I agree with the 15-40 or something like the Rotella 5-40 if you want synthetic. Jet outdrives do not load an engine much, other than the high RPM, they are pretty easy duty.
With all due respects...A Jet pump puts a constant load on the engine. There's no "neutral" it's direct drive to the engine with out any help from gears a transmission in a car and, a jet pump acts like a water brake on a engine dyno. > not enough power w/a too big an impeller it'll choke the engine down.
Below is mine...
I agree with the 15-40 or something like the Rotella 5-40 if you want synthetic. Jet outdrives do not load an engine much, other than the high RPM, they are pretty easy duty.
With all due respects...A Jet pump puts a constant load on the engine. There's no "neutral" it's direct drive to the engine with out any help from gears a transmission in a car and, a jet pump acts like a water brake on a engine dyno. > not enough power w/a too big an impeller it'll choke the engine down.
Below is mine...
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My first choice would be Chevron Delo 15W40, and second, Mobil Delvac 1300 Super. I can't comment on the synthetics. I've not used a synthetic heavy duty engine oil.
Originally Posted By: Gillsy
My first choice would be Chevron Delo 15W40, and second, Mobil Delvac 1300 Super. I can't comment on the synthetics. I've not used a synthetic heavy duty engine oil.
I use Delvac in my low RPM Diesel that has roller lifters...why would I use diesel oil in a flat lifter cam, high rpm engine that's always under a load?
My first choice would be Chevron Delo 15W40, and second, Mobil Delvac 1300 Super. I can't comment on the synthetics. I've not used a synthetic heavy duty engine oil.
I use Delvac in my low RPM Diesel that has roller lifters...why would I use diesel oil in a flat lifter cam, high rpm engine that's always under a load?
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