2008 Mercury optimax 75hp

I usually run DFI synthetic. But I need to fill the tank to fish and can't find any locally. Thinking about this. Any comments...will this be ok?Attachment 361792

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I don't know what DFI is, but the oil shown is a "blend" which means it is not a pure synthetic. If you are looking for a true synthetic, this is not it. That being said, I am sure it will work fine.

Yep, it will do fine. TCW3 is a high standard, if it meets it, run it.
I usually run Quicksilver TCW3, but on occasion I have run Penzoil TCW3 with no problems.
BTW you can get a gallon of Penzoil TCW3 from Amazon for around fifteen bucks a gallon, heck of a deal.

Be careful, some of these new DFI motors run a different spec oil. Check the specs real close because I have read where they will not mix.

Yeah was kinda worried about the DFI part. I think it burns a little different

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I've heard old school machanic's that say don't use Pennzoil.

But then again heard old school auto mechanics say don't use valvoline oil

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Originally Posted by Mbsbeek

But then again heard old school auto mechanics say don't use valvoline oil

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Used to get and read Bass and Walley boats religiously. They were a magazine dedicated to performance and tons of maintaince Articles.
They did several reviews on oils over the years. Only Pennzoil they ever recommended was their pure synthetic for high rpm race motors. Other than that it was way down the list for outboards.

I was told the same about not using Pennzoil.

Best I could figure out was that DFI engines do not mix the gas before injection. They inject both at the same time. There are mainly only two manufacturing DFI Mercury and Quicksilver.

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The Optimax is a direct injected motor and Mercury DFI was specified for that motor. Before Mercury came out with the DFI oil the earlier Optimax motors called for Mercury Premium Plus oil. I believe Mercury owners manuals say that if the DFI oil isn’t available that You can substitute the Premium Plus oil. You can get it at Walmart.

Thank you lower rider

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I’ve used the pennsoil for a long time with no ill effect. The other woman had a steady diet of it for at least 8 years, and I drove it like I stole it. Mariner 150. Friend bought two or three cases of gallons super cheap and used it in his 115 optimax and never had an issue. Takes a long time for a weekend warrior to go through 3 cases of oil. I buy the blend of synthetic and natural.

Penzoil XLF and synthetic blend is just fine for carb and EFI twostrokes. On the Optimax, you need to use the Merc/Quicksilver DFI. The Merc/Quicksilver Premium Plus/Synthetic Blend is an acceptable substitute and can be mixed with DFI. Merc and Quicksilver are the same oil and both made by Mercury. The QS was made to sell to non Mercury dealers like Walmart. The DFI and Premium Plus have s specific flow rate to propperly lubricate the compressor on the Optis. I once had a customer using Walmart Supertec oil in his Merc 250ProXS. He found out the hard way that compressors are around $1,000 before tax and labor.

Thanks Bullet101.

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I have a 135 Opti. When it was installed on the boat in 2013, I watched as the mechanic poured a gallon of Premium Plus in the tank. He told me to only use Premium plus or the Opti DFI oil in it. I have done so and it's still going strong today. A local dealer here buys the DFI oil in 55 gal drums and pumps it into clear gallon jugs to save the customers money. I think the last couple of gallons I bought was $22.95 per gallon. That's cheap for mercury DFI oil. PM me if you want the name/number of the dealer.

Precision Lubricants 2-Cycle Marine Oil | Mercury Marine

Chris

Me i have used Amsoil Interceptor since new in my 2000 135 Optimax that`s going on 20 years and only had one problem when one injector had to be cleaned besides normal maintenance, and 800 plus hours.