Maintenance Tip of the Week: Oil 10/05/2015

Maintenance Tip of the Week – oil 10/05/2015

Always use the proper SAE oil when changing the oil in your engine. Marinediesel has tested its engines for many hours to determine the correct oil type, and using the proper oil, as specified in your manual, can easily extend your engine life by as much as 50%.

Maintenance Tip of the Week: Oil 05/18/2015


Maintenance Tip of the Week – Oil


The oil change intervals in your manual should be regarded as minimum service periods. If the vessel will be operating under harsh conditions, or sitting immobile for long periods of time, change the oil more frequently.




Oil Change Intervals – VGT Series



Perhaps the most common and critical maintenance procedures on any marine engine are the procedures related to filter and oil changes. Oil breaks down under use and heat, and changing the oil according to the specifications in the manual is important in adhering to the conditions of your warranty. The standard oil change interval for our VGT Series is 100 hours.

However, we are occasionally asked by customers if this interval can be extended. The answer is, “Yes”, under certain conditions described below. The interval need to change oil is primarily determined by both engine load and environment.

MarineDiesel’s VGT series marine engines have a standard oil change interval of 100hrs, however this has been selected due to variables in regional use such as load cycles, quality of fuel and lubrication oil etc. It is allowed to extend the oil change intervals under certain conditions; these must be closely monitored and given written approval by an authorized Marinediesel distributor.

The extended oil change intervals are only allowed on applications that have a predictable usage cycle, for example you are not allowed to perform below tests on a 200hr cycle where the engine is used at idle to then drastically alter the usage after extension approval.

Follow the recommendations below:

At 100 hrs: Take an oil sample and send to get it analysed. If the oil comes back as good to use then continue operations for another 50hrs. Top up engine oil if needed
At 150 hrs: Take an oil sample and send to get it analysed. If the oil comes back as good to use then continue operations for another 50hrs. Top off engine oil is needed.

Next 50hr check: Same as above

The maximum allowed oil change interval is set to 250hrs but this is not possible for all applications as oil tests may show.

Use oil and filter as specified in the engine technical manual.

If you have any questions regarding this break-in procedure please consult the technical department at Marinediesel in Sweden.





Maintenance Tip of the Week – Sludge 04/20/2015


Maintenance Tip of the Week – Sludge

When changing oil filters, inspect the old filter for excessive sludge, metallic bits, or rubbish. This is a leading indicator of serious mechanical wear in the cylinders, pistons, and other engine components.


Maintenance Tip of the Week – Oil Filters 04/06/2015


Maintenance Tip of the Week – Oil Filters

Operations under high load factors or extreme environmental conditions can greatly shorten oil life and oil quality. When the vessel is operated under such circumstances, more frequent changes of oil and oil filters than indicated in your manual may be necessary in order to prevent engine damage. Oil sampling and testing on a periodic basis can help ensure trouble free operation of your engines.


Why does oil need to be changed?



Why does engine oil need to be changed? An interesting question, no doubt. It is also a logical question. Theoretically, MarineDiesel engines are sealed with gaskets and a multitude of filters. Engine oil should never get “dirty”. Yet, it does get dirty, and eventually turn to sludge. Why is that?

The short answer is due to chemical change.

Oil breaks down over time. It changes chemically as it sits in the engine. As the oil breaks down, it loses its’ lubricating and cooling properties, (the reason it is needed in the first place), and can perform those functions less efficiently. That is why your MarineDiesel manual will require a change of engine oil at least annually, or more often, depending on use.

The other reason is that, despite the engine being “sealed”, minute amounts of microscopic particles will enter the engine from the air, water, or through wear and tear of the engine itself. Of course, lack of maintenance exacerbates this process, and can quickly turn the oil into sludge as the engine runs. Gaskets wear out. Filters become clogged. Extreme climates add to the problem. These microscopic particles can be difficult to detect without specialized equipment. Many MarineDiesel distributors have the equipment and training that is necessary for this testing, and you should contact them for assistance with ongoing problems related to oil.

MarineDiesel recommends the use of synthetic oil in our engines. The paragraphs below are from a service bulletin we issued when we changed from natural to synthetic oil. The type of oil is extremely important in keeping your engine operating trouble free.

Marinediesel is changing the oil specification for all VGT engines from 15W/40 API:CJ-4 (mineral oil) to FULLY SYNTHETIC 15W/40 API: CJ-4.
If a 15W-40 quality is difficult to find on the operators location 10W-40 or 5W-40 oil in the same quality range is perfectly suitable

Those oils (10-40/5-40) are also strongly recommended for cooler climates, but can without problems be used globally

Background for change:

It has been seen in a few of our in-house durability tests where the engines are run at tropical scenarios and at high load for prolonged time that there is a potential for deposit or sludge build-up in the turbo housing. The turbo is cooled both by coolant and the oil itself, the oil temperature is well within limits of what a mineral oil can handle but the wall of the turbo can exceed these temperature limits under severe conditions and cause some deposit building up on this wall. These deposits could over time cause disturbances with the hydraulic actuation of the VGT vane system in the turbo.

Synthetic oil will not cause deposit build-up even under severe conditions and we strongly recommend that all VGT engines are serviced with FULLY SYNTHETIC 15W/40 CJ-4 oil  or similar quality/weight as mentioned above.   



Maintenance Tip of the Week – Overfill 09/15/2014

Maintenance Tip of the Week:

Overfilling oil causes several issues: Wasted oil and its’ additional cost, excessive wear on gaskets and seals, and, most problematic, oil may get blown into the intake manifold, and into the cylinders, where it will foam and lose its’ ability to lubricate.





Maintenance Tip of the Week – Oil Change 08/18/2014



Maintenance Tip of the Week

When changing your engine’s oil, running the engine until it is warm before changing the oil makes the oil change easier, and more effective.


Celebrate Industrial Engine Week! – Oil and Gas Industry





Though the word “Marine” is in MarineDiesel’s name, we sell an awful lot of engines that are intended for industrial use through our MDPT subsidiary. In light of this fact, we have designated Industrial Engine Week to be the first week of August.

Each day during the week we will be featuring and highlighting a different industrial engine application.

So, since it is now Monday, we kick off with the Oil and Gas Industry.

We feature most engines in the GM Ecotec and Vortec lines. The oil and gas industry has very strict requirements for reliability, noise, emissions, and type of fuel. The GM product range gives MDPT the tools to effectively serve this industry with economical, reliable engines that meet all international standards. This GM heritage when combined with Swedish engineering serves both land and offshore applications.

Typical applications for our engines in the industry include:

  • Pumps
  • Pump Jacks
  • Compressors
  • Vapor Recovery Units
  • Fire Control
  • Extraction Pumps

Additionally, we can provide engines that utilize alternative or multiple fuel types, depending on the application, such as LNG or LPG.

For offshore applications, we can customize the engines using our marine experience, by utilizing marinized parts that can withstand the harsh environment and give greater reliability than cheaper, unreliable alternatives. Every second that an engine is out of service means thousands of dollars in lost revenues and increased costs.

For oilfield operations, harsh environments (cold, heat, or weather) in remote locations are the norm, rather than the exception. The MDPT reliability and service are critical to operations in these areas.

Given the unique challenges faced by the industry, MDPT can put together a customized proposal to meet all of your oil and gas industry needs, no matter how complex or challenging.


Maintenance Tip of the Week – Oil 06/09/2014


Maintenance Tip of the Week


On the VGT Series, your oil consumption should be just under one liter of oil consumed for every 379 liters of fuel consumed AFTER THE RUN IN period. If oil is being consumed faster, then there is a leak or another serious problem.