Engine oil specification for GDI 2.0 engine -s : | platizazvonok.ru
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post #1 of 9 (permalink) Old 11-06-2013, 05:59 AM Thread Starter
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Engine oil specification for GDI 2.0 engine

I'm looking for some official statement by Hyundai Europe or similar, that a ACEA A1 rated engine oil is not sufficient and ACEA A5 is to be EXCLUSIVELY used.

Background: The Passenger Vehicle Lubrication and Fluid Specifications on the official Hyundai Australia web pages (as checked on 6/11/2013) list for the i40 2.0 GDI engine an API SL or above rated oil to be used, whereas the owners' manual delivered with the car in 2011 states only ACEA A5. An official dealership used an API SL / ACEA A1 rated oil in the last service. Querying this, in a separate letter Hyundai Australia states: "The engine oil specification we state for your vehicle advises that if ACEA A5 is not available, the use of API SL, SM or above is suitable." While a direct comparism of the American API categories to the European ACEA are not possible, I doubt that this general substitution down to SL is correct and ensures the longevity of this GDI engine.

Any help, explanation or advice appreciated.
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post #2 of 9 (permalink) Old 01-19-2014, 03:18 PM
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According to my handbook and i quote:
GDI engine
API Service SL or SM, ACEA A5 or above.
Use the engine oils approved by Hyundai Motor Company
Consult an authorized HYUNDAI dealer for details.

There is also a table of recommended Brands/Products.
A wild guess from me would be the enviromental considerations making a difference between Australian and Europeen manuals, we do not experience the high temperatures parts of Auz are exposed to, neither the extremes in humidity. Mind you it gots pretty cold over here in Norway

If you are in a temperate part of the south I am guessing Europeen standards would be OK too!!
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post #3 of 9 (permalink) Old 01-19-2014, 11:19 PM
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Europe has much stricter emissions ratings than Australia, of course they will insist on the oil that produces the lowest emissions be used IN EUROPE, this includes the waste oil after it's removed from the engine.. Your car will be used in Australia I presume, go with what the local dealer or the operator booklet recommends. The A5 rating although the best for reduced emissions, may not be the best oil for long engine life, remember Europeans typically turn their cars over in around 5 years or less, so they are not concerned too much if the engine is chewed up by the time the warranty runs out. What allows the A5 oil to achieve low emissions is it doesn't have any or very low amounts sulphated ash, Phosphorous, and Sulpher. Which is a pity because sulphated ash is beneficial in controlling cylinder wall wear and valve seat recession, and both Phosphorous and Sulpher help with extending plain bush type bearing life and loadings, big ends, mains, gudgeons, camshaft bearings etc. Also use the correct viscosity grade for your climate, the Hyundai preferred grade is again to help achieve their fuel figures, not best engine life, look in your operators book at the page with 'Alternate acceptable oil grades chart' and pick the grade which best suits you region. The mechanical design tolerances and bearing clearances in a Hyundai engine are exactly the same as in a 50 year old Ford or GM engine, when we had no qualms using 20W50 oil, or thicker.
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post #4 of 9 (permalink) Old 01-23-2014, 10:26 AM
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Quote:
Originally Posted by Ray G View Post
Europe has much stricter emissions ratings than Australia.
Yes and no - Australia adopts the Euro emissions standards but usually a year or two after Europe

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post #5 of 9 (permalink) Old 01-23-2014, 10:31 AM
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Originally Posted by Woodchukker View Post
API Service SL or SM, ACEA A5 or above.
If that's the way it's worded, it's partly wrong - API Service standards are minimums so later standards, eg SN will automatically be higher.

ACEA categories have both minimums and maximum so there's no concept of a different category being higher or lower - if an engine needs ACEA-A5 it must have A5, not some other rating that is alphabetically or numerically "higher".

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post #6 of 9 (permalink) Old 01-23-2014, 10:41 AM
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Quote:
Originally Posted by Ray G View Post
The mechanical design tolerances and bearing clearances in a Hyundai engine are exactly the same as in a 50 year old Ford or GM engine, when we had no qualms using 20W50 oil, or thicker.
The manufacturing tolerances on modern engines are minute, compared to those of 50 years ago.

On Bob's The Oil Guy website there's good reasoned argument as to why all modern engines need a 30 oil - given that combustion temperatures can reach 3000 C, the difference in internal engine temperature between cars in the Arctic and Tropics is minimal

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post #7 of 9 (permalink) Old 01-23-2014, 08:27 PM
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True manufacturing tolerances are much tighter, this means that when an engine has a designed running clearance of say .005" +/- .0002" in a modern engine you can be assured every engine has exactly the same clearance. In a 50 year old design the tolerance may have been .005" +.0025"/ -.001". Same basic design clearance but manufacturing processes of the day were not as automated, more manual tooling, greater spread of tool wear etcetera resulting in good engines and 'lemons' straight off the line. These days, barring one off duds, every engine performs exactly like every other engine.

Oil not only 'lubricates' it also provides cushioning for parts that slide and bang over each other, camshafts, followers, valve tips, a higher viscosity oil provides more cushioning, therefore less damage to these items. One of the most common complaints on these forums, 'Top end noise', some members have spent months/years in legal arguments with Hyundai to make good 'top engine noise', I just changed my oil grade.

I do fully understand that low weight oils have real benefits in cool/cold climates where extreme cold causes flow problems, but in temperate or hot areas I'd always defer to the listed 'alternate grades' as listed in every Hyundai owners manual. Cheers.
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post #8 of 9 (permalink) Old 08-06-2014, 07:57 AM Thread Starter
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Quote:
Originally Posted by Ruperts Trooper View Post
If that's the way it's worded, it's partly wrong - API Service standards are minimums so later standards, eg SN will automatically be higher.

ACEA categories have both minimums and maximum so there's no concept of a different category being higher or lower - if an engine needs ACEA-A5 it must have A5, not some other rating that is alphabetically or numerically "higher".
This is exactly the way I'm thinking, cannot follow Hyunday's reasoning that that an oil with a sequential API category of SL defined in 2001 is suitable for a production car in 2010, ie 9 years later. I would have expected SN as higher specs for sludge control and improved protection piston deposits seem highly relevant for a GDI engine running quite lean and has no flushing of the inlet valves to wash off any oil sludge resulting from the crank case ventilation. Also, I cannot find a multi rated oil that is ACEA A5 conforming, while still only API SL. One thing is clear so, the only ACEA A5 rated oils are the most expensive ones on the shelf at least here in Australia, about double than that what the dealer had used. No doubt this has a significant negative impact on the service cost if it indeed had to be used. On my part, I think I will stick to using ACEA A5 as originally specified in hand book as I intent to keep the car for quite sometime. For me, definitely no SL rated stuff.
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post #9 of 9 (permalink) Old 08-07-2014, 08:19 PM
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Another thing to be wary of with ACEA ratings, they are not fixed. An oil rated A3B4 in 2008 may not meet A3B4 ratings in 2012, the ratings are continually revised the current A3B4 rating is suffixed .12 indicating year 2012. This is not the same oil rating that my i30 made in 2010 needs. I'm now using good old Castrol RX Super in my diesel. 15W40 SAE rating CI +, ACEA rating E7 (a heavy duty commercial spec). for CRDi engines with EGR and exhaust after treatment. RX has far superior sludge and wear control than any auto spec oil, after all truck engines are expected to run for millions of kilometers. Also with the 15W40 the engine is far quieter, much less valve train and timing chain noise.
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