optimax 250xs

[XstreamVking]

Never used any oil but prem plus merc oil in my opti's. Getting really good performance and economy, very reliable. Compressors are lasting 600 or more hrs. First one I bought new, an 01, has lasted for nearly 1800 hrs on my flats boat. I guide out of two boats and wouldn't run anything but opti's.

[vnemous]

This is what it say but its not a service bulletin.

New Oil Recommendation for All OptiMax Engine Models

Effective October 2010, Mercury OptiMax / DFI or Quicksilver DFI 2-Cycle engine oil is the recommended oil for all OptiMax models - including Pro XS. (The previous recommendation stated the use of Mercury Premium Plus 2-Cycle Outboard Oil in ProXS models and OptiMax oil in non-ProXS models.)
OptiMax / DFI oil is a superior oil when compared to the Premium Plus oil. While both products are high quality 2-cycle engine oils suitable for use in OptiMax engines, the OptiMax / DFI oil contains a higher percentage of additives that reduce carbon deposit formation.
Over time, under normal operating conditions, carbon deposits accumulate in the power cylinder (piston, cylinder head, liners). In most cases the carbon deposits do not create a problem, but carbon deposits that form on the piston - particularly behind the piston rings and piston skirts - can reduce engine life and performance.
OptiMax / DFI oil is specially formulated to prevent the carbon deposits from forming. It also does a better job of reducing existing carbon deposits than the Premium Plus oil. Going forward, the Operation, Maintenance and Warranty manuals for OptiMax outboards will recommend Mercury OptiMax / DFI or Quicksilver DFI 2-Cycle engine oil to help maximize engine life and performance.
Operation, Maintenance and Warranty and Service manuals are in the process of being updated and will contain the following:
Oil Recommendation

Recommended Oil

Mercury OptiMax / DFI or Quicksilver DFI 2-Cycle Engine Oil

Mercury OptiMax / DFI or Quicksilver DFI 2-Cycle Engine Oil is recommended for your engine. If Mercury OptiMax / DFI or Quicksilver DFI 2-Cycle Engine Oil is not available, we recommend using Mercury or Quicksilver TC-W3 Premium Plus 2-Cycle Oil. Severe engine damage may result from use of an inferior oil.

[vnemous]

But than there is this

Mercury Racing 2‑Stroke Engine Oil
Models Covered
Models Covered
Serial Number Or Year
200XS, SST, and Offshore Race
All
250XS and 300XS OptiMax
Non‑Current Mercury Racing 2‑Stroke Engines (2.5 EFI, 225X Pro Max, 300X Pro Max, and 225
Sport XS, 200XS)
Situation
Mercury Racing 2‑stroke engines have had different recommended oils for various engine models. Mercury Racing now
recommends a common engine oil for all our 2‑stroke models except the JP OptiMax. JP OptiMax products will continue to
require Mercury 2‑Stroke Multi‑Fuel Oil, which has additional additives for use with Jet Petroleums (JP).
Correction
Mercury Racing 2‑Stroke Engine Oil is the recommended engine oil for all current and non‑current Mercury Racing 2‑stroke
engines, except the JP Optimax.
Mercury Racing 2‑Stroke Engine Oil is the same as Quicksilver Rejuvenate 2‑Cycle Oil. Currently, both Mercury Racing
2‑Stroke Engine Oil and Quicksilver Rejuvenate 2‑Cycle Oil will be available. Quicksilver Rejuvenate 2‑Cycle Oil is scheduled
to become no longer available (NLA), and the 2‑stroke engine oil will need to be ordered under its new name and part numbers.
Before adding Mercury Racing 2‑Stroke Engine Oil to a boat's oil tank, a majority of the previous 2‑stroke oil in the tank should
be used up or removed, unless the tank was previously filled with Mercury Rejuvenate or Mercury 2‑Stroke Multi‑Fuel Oil.
Description
Part number
Size
Mercury Racing 2‑Stroke Engine Oil
8M0078011
Gallon
8M0078012
55 Gallon








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MERCURY Racing

[vnemous]

Called Mercury Racing today and they said all opti's including the pro xs should follow the latest Service Bulletin stating DFI oil. Less carbon buildup.

[gregpro50]

The pro xs is different than the racing xs. On the Mercury website it shows the pro xs uses opti oil but the racing xs uses premium plus.

[vnemous]

Greg they said all opti's, We specifically asked about the 300xs. Thats what we tell our customers and just wanted to make sure. People can burn what they want.

[Markus]

Hi. I am considering purchasing a boat with twin 2006 optimax 250"s. they have 450 hours. Used in salt water. Assume good maintenance. How many useful hours do you think they have left?

They are designed for "high hundreds".

[ctbassing]

I have had good luck with my 250xs. Just take care of it

[tony1204au]

If the compressor fails, sending chunks of metal into to air injectors, and then causes this catastrophic failure. Is it possible to put a filter of some sort between the compressor and the rail??