new 383...what oil

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swampthing3
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new 383...what oil

Postby swampthing3 » Tue May 14, 2019 10:24 am

Hi all. I got a boat with a fresh 383 on it that still has break in oil in it.

It has 23 hours on it. I want to change the oil. What would be a good weight/brand to run?

Thanks!

jamesskycop
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Re: new 383...what oil

Postby jamesskycop » Tue May 14, 2019 10:37 am

I like Royal Purple 10/40 full synthetic....

swampthing3
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Re: new 383...what oil

Postby swampthing3 » Tue May 14, 2019 11:17 am

What would be the advantage of synthetic over conventional? Extra heat and load being put on the engine?

Rich Andrews
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Re: new 383...what oil

Postby Rich Andrews » Tue May 14, 2019 11:54 am

might want to ask the builder of the motor the clearance specs before you go about putting oil in it...
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SWAMPHUNTER45
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Re: new 383...what oil

Postby SWAMPHUNTER45 » Tue May 14, 2019 12:32 pm

Rich gave you great advice. Look and see on your paper work if the seller provided any info on an oil requirement.

Is the engine roller or flat tappet?

YOU WILL DESTROY THE ENGINE IF IT IS FLAT TAPPET AND YOU FAIL TO PROVIDE AN OIL WITH ZZDP

swampthing3
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Re: new 383...what oil

Postby swampthing3 » Tue May 14, 2019 12:47 pm

I got the boat 3rd hand. I was told its roller.

That being said, I cant prove it without taking it apart. It runs perfect and want to continue that way. Just to be safe, should I run oil with zinc just to be sure? Is there a negative effect if its a roller lifter and I run the zinc oil?

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smokster
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Re: new 383...what oil

Postby smokster » Tue May 14, 2019 1:49 pm

cant go wrong with 10w 40 amsoil z-rod. thats what glen treadwell recommends for his motors even roller motors. use a good oil filter and change it about twice a year

swampthing3
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Re: new 383...what oil

Postby swampthing3 » Tue May 14, 2019 3:05 pm

been doing some reading, the Valvoline VR1 sounds like a good one. they have 10w-30 and 20w-50 synthetic. Not knowing the clearences exactly, would the thicker oil be a safer bet?

hdsadey
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Re: new 383...what oil

Postby hdsadey » Tue May 14, 2019 3:22 pm

I run Valvoline VR1 Racing 20w-50 on a direct drive solid flat tappet 408 Windsor. Joe Gibbs also makes flat tappet oils. I like conventional oils, no synthetics for me! Any idea what weight the break in oil is? 10 psi per 1k RPM is the general rule. If you know what's in there now and idle pressure, you can adjust with weight.
02 Predator 12' 0320 Lycoming
92 Big O 13' Ford 408 Windsor DD Dry Runnin MOFO!
99 Donzi 16 Classic 350 Vortec

swampthing3
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Re: new 383...what oil

Postby swampthing3 » Tue May 14, 2019 3:52 pm

Why do you like the conventional over synthetic?

current pressure at idle is just over 40 pounds

hdsadey
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Re: new 383...what oil

Postby hdsadey » Tue May 14, 2019 7:22 pm

Synthetics are designed for newer power plants in my opinion. They don't seem to get along with old style gaskets and like to leak. Just my opinion. LS is fine with synthetics but not old sbc's. 40 psi at an idle is WAY high for my liking. Probably has a high volume pump which is also not needed unless bearing clearances have been purposely opened up or worn out. I posted a thread awhile back about high volume pumps. Puts a lot of stress on distributor gear. If it was me I would swap the pump out for a standard volume pump, your engine will thank you in the long run.
02 Predator 12' 0320 Lycoming
92 Big O 13' Ford 408 Windsor DD Dry Runnin MOFO!
99 Donzi 16 Classic 350 Vortec

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dodobird
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Re: new 383...what oil

Postby dodobird » Tue May 14, 2019 8:02 pm

If flat tappet VR1 has high zinc I use 50w

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barhopper
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Re: new 383...what oil

Postby barhopper » Wed May 15, 2019 6:17 pm

Brad Penn 20 50 is my choice of oil. High zinc content.

pierson skunkape
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Re: new 383...what oil

Postby pierson skunkape » Wed May 29, 2019 12:43 pm

I've been an amsoil dealer for almost 45 years at my muffler shop...I grew up racing dirt bikes with this stuff I believe there is no.. as far as Royal purple junk in my opinion.. amsoil oil is the only oil that can take 25000 mile dump interval ask around fact... 23 hours on break in oil get it out of there... The is Iran oil is great and has plenty of zinc in it...I had over $600 on my last 383 I just got rid of direct drive.... If you do go with a z rod high zinc formula... The 25,000 miles will never be achieved just change it every year or every hundred hours.... Just my humble opinion piece out

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dodobird
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Re: new 383...what oil

Postby dodobird » Thu May 30, 2019 6:14 am

pierson skunkape wrote:I've been an amsoil dealer for almost 45 years at my muffler shop...I grew up racing dirt bikes with this stuff I believe there is no.. as far as Royal purple junk in my opinion.. amsoil oil is the only oil that can take 25000 mile dump interval ask around fact... 23 hours on break in oil get it out of there... The is Iran oil is great and has plenty of zinc in it...I had over $600 on my last 383 I just got rid of direct drive.... If you do go with a z rod high zinc formula... The 25,000 miles will never be achieved just change it every year or every hundred hours.... Just my humble opinion piece out
I agree I used the royal purple n it was junk I wouldn't put that stuff on a bicycle chain

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SWAMPHUNTER45
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Re: new 383...what oil

Postby SWAMPHUNTER45 » Thu May 30, 2019 8:04 am

Mr. Branch is an Amsoil dealer as well and sends most of his new engines out with the special Z-Rod formula in them. The nice thing about Z-Rod is not only does it have the ideal level of zzpd to protect the cam and lifters but it also has a special quality to prevent rust when not in use.

They offer it in 10w-30 and 20w-50 last I checked.


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