Rersearch indicates a GDI engine will POSSIBLY perform better with a longer life using a synthetic oil with the following qualities : Low Calcium (LSPI) , less VI improvers , low NOACK and a 30W to guard against fuel delution (in an otherwise 5W20 application). In playing with Mobil 1 HTHS numbers I have settled on a M1 5W20 (hate the low VI of 160 though) so because of that I'll add the possibility of using M1 5W30 and M1 0W40 in a 50/50 ratio . Based on above information would I be better with a 50/50 blend of M1 5W20 with M1 0W40 OR going with a 50/50 blend of M1 5W30 and M1 0W40 ? Also if you think a different ratio would be better then please advise ... *My goal is to have a 30W synthetic oil which is stout for GDI usage where I want a low to mid 30W oil , with lower VI improvers , which will resist fuel delution while maintaining the other GDI engine regarded benefits . Lastly I did not consider the M1 AFE oils as they are believed to have higher VI improvers than either M1 0W40 or the M1 5W20 / M1 5W30 oils ... P.S. Yes , I could just go buy M1 5W30 and call it a day but that is not the point for potential education here on BITOG ... Thanks in advance !
Formulating a Better GDI Engine Oil ?
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If you're worried about calcium levels, M1 0W40 may not be a great choice...it is unlike much of the rest of the M1 line in having a healthy dose of calcium.
https://bobistheoilguy.com/forums/ubbthreads.php/topics/4028326/Mobil_1_M1_0W-40_%22FS%22
I understand that you're talking about blending it with a lower calcium oil, but just wanted to mention this given the desired qualities you mention above.
https://bobistheoilguy.com/forums/ubbthreads.php/topics/4028326/Mobil_1_M1_0W-40_%22FS%22
I understand that you're talking about blending it with a lower calcium oil, but just wanted to mention this given the desired qualities you mention above.
Have you considered an ester based Group V engine oil? If you choose Red Line you can call their tech support line and talk to Dave.
Or, how about an oil based on a high olec value vegetable base stock like RLI lubricants. If you choose RLI you can call them on the phone and get right to their tech support.
Older Link to a project done to address fuel dilution.
Or, how about an oil based on a high olec value vegetable base stock like RLI lubricants. If you choose RLI you can call them on the phone and get right to their tech support.
Older Link to a project done to address fuel dilution.
My vote would be for Red Line in a 0w30 5w30 or 10w30 great HTHS Group V based. No need to home blend.
Originally Posted By: tig1
GDI is apparently tech in reverse. What's wrong with PFI?
As I understand it, the GDI has a cooling effect in the combustion chamber such that they can run more timing and/or have a higher compression ratio generating more power or useful work out of the same gas used as PFI. This is very helpful indeed in turbo-charged engines as it allows for a even higher compression ratios to be used, more boost, more timing, etc. to get more power out without detonation.
As you likely already know, there are some OEMs that have combined the two systems and switch between them for the best of both worlds. It's just more complex and more expensive to do so.
GDI is apparently tech in reverse. What's wrong with PFI?
As I understand it, the GDI has a cooling effect in the combustion chamber such that they can run more timing and/or have a higher compression ratio generating more power or useful work out of the same gas used as PFI. This is very helpful indeed in turbo-charged engines as it allows for a even higher compression ratios to be used, more boost, more timing, etc. to get more power out without detonation.
As you likely already know, there are some OEMs that have combined the two systems and switch between them for the best of both worlds. It's just more complex and more expensive to do so.
4WD
$50 site donor 2025
RL would be great post warranty - but when I visit their website things get worded much like Amsoil SS ...
if getting builder approval is as cheap & easy as one member claims - wish they would just do so ...
if getting builder approval is as cheap & easy as one member claims - wish they would just do so ...
Originally Posted By: ChrisD46
OP here - the high calcium of the M1 0W40 nixes my mix intentions - thus straight M1 5W30 is about as good as it gets for my Hyundai GDI engine until a new oil specification comes along that may be better.
Interesting. Would you consider the Castrol Edge 0W-40 (Euro) oil better than the M1 0W-40 oil for this application?
OP here - the high calcium of the M1 0W40 nixes my mix intentions - thus straight M1 5W30 is about as good as it gets for my Hyundai GDI engine until a new oil specification comes along that may be better.
Interesting. Would you consider the Castrol Edge 0W-40 (Euro) oil better than the M1 0W-40 oil for this application?
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