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always have used WIX or Napa Gold - readily available in almost any town at O'Reilly's or Napa

Boat is a 2003. The fill cap says 15w40 (b/c they had a deal with Valvoline marine oil). PO ran M1 15w50 for many years. It had a fresh fill of M1 15w50 when i bought the boat in spring of 2017 and I ran it that year. I was going to stick with M1 15w50 until the manufacturer emailed me put 5w30...

what would be your 1st choice in a marine application (of the 3 oils I mentioned) ?

OK, i suppose i will just stick to delvac b/c it's on sale for $14 right now. The prior owner ran M1 15w50 and I stepped down to 15w40 HDEO b/c I thought the 50 was too thick. I've always wondered about the 10w40

I've been running Delvac 1300 15w40 for the last 3 years. Do you think the M1 10w40 HM would be better for my inboard ski boat. It's a 5.7L MPFI engine - Typically 50F-95F outside temp during our ski season. Not unhappy with my oil choice but always wondered if that stuff is too thick at...

thanks for all the helpful advice everyone

Originally Posted by jayjr1105 The J-series are extremely picky on oil if they have VCM, which this one does. All of the older J-series VCM equipped engines that I've seen tend to consume significant amounts of oil as they get older. I would change the oil at least every 5K. i disabled the...

makes sense. so it Ultra Platinum just marketing - i use regular PP

i feel comfortable doing it - i just wanted to make sure it wasn't a really bad idea. The onwers manual says 7500 but the maint minder comes on about 6k with my wifes city driving. I had all the service records from the previous owner and they were doing it about 8-9k but I think they did more...

I've been doing a 6K OCI on my 2013 Pilot when the 20% light comes on - We have owned the Pilot for a year and are putting about 16k a year on it. Engine has 100k and is not burning any oil between changes. Been thinking of doing a 8k OCI and just doing it April and October to make it simple...

Yeah it's all over the board. Ilmor is suggesting 15w40 Rotella for their 6L and 5w30 for the other engines Marine Power is suggesting 15w40 for all the Gen IV stuff that is not supercharged and 5w30 Dexos Gen 2 for all the Gen V DI engines my Gen III LS1 is running about 35-40 PSI at Idle and...

you know I think you are on to something with Pre Ignition issues in DI engines. I wonder if they just said 5w30 to keep the recomendation consistent with all there new engines. The old engines they mention to say on 15w40 haven't been made in some time

i did a little more reading and from what I can tell they are doing the lower viscosity on some of the new PCM engines due to problems with failing oil pumps. And also for the direct injection engines. I'm still sticking to my 15w40 ... If it aint broke, don't fix it.

I typically change every 40-60 hours anyway at the end of each season. It takes 15 minutes to change because it's a straight inboard and I trailer it. I just thought it odd the lower viscosity. I have wanted to run a stout 5w30 but haven't because everyone typically runs 15W40. If it was a...

Attached is a screenshot of an advisory from PCM (the engines in Nautique boats). They are suggesting the 6.0L and some other engines switch to 5w30 Dexos 2 instead of 15w40. I know that Ilmor and Indmar are also saying run 5w30 in some of their newer engines. I have a LS1 Engine and it's is...

I'm gonna say about 5 ounces http://oilfilterdata.com/index.php?view=filter_info&model=57060

we've run Pennzoil Semi-Synthetic 2 stroke oil for the last 15 years with good success - it's easy to find too. http://www.pennzoil.com/en_us/products/o...2NhbGU9ZW5fdXM=

If your lower unit doesn't take in water, the Pennzoil Marine gear lube is fine. It's easier to get in there with that tapered spout.

Thanks Guys - I'll keep on using the premium blue this year. If I notice anything odd I will check out that Schaeffer's oil. Looks like they have a retail store close to me.

thank you. Some of this is a little over my head - but the Premium Blue is showing CK-4 and SN - so it seems I should be good with that.