Feb 5 2021, 01:36 AM
QUOTE(zeng @ Jan 25 2021, 12:12 PM)
Nissan Total semisyn 10W40 SL A3/B4,
2200 km over 6 months in a 1987 Volvo B230E 2.3L SOHC MPFI ...
The centre zone is a bit grayish , but it basically remains transparent which is good news .
However within the enlarged/magnified centre zone , one can 'see' clearly spots of very blackish/darkish contrast in relation to the whitish background .
I would speculate this phenomenon arises from the presence of heavy particles/debris in possibly coagulated metal wear particles (like iron/copper/aluminium etc, ) and/or agglomerated organic combustion contaminants etc . But who knows it may not be the case IDK, in particular without evidence/facts from a pricy UOA to support this speculation on my part .
As quite similar to Total Qaurtz Energy 10W40 with 2600 km in another car i.e Honda Accord , there is obvious emergence of slightly grayed/darkened aureole zone/perimeter ring which may require close monitoring on your part .
Diffusion zone is generally clean and transparent , absence of darkened jagged external edge and absence of halo translucent annulus in the outermost zone , which I'm honestly quite surprised with both your low mileage oil samples over 6 month usage . It indicates fuel delivery systems of both engines are in quite a tip-top conditions despite of rather frequent short drives .
My other previous comments on your Honda generally applies in this Volvo , a difference being Honda appears to have lesser metal wear particles vs Volvo , IMHO .
Generally, this 2000 km used Nissan Total 10W40 is still serviceable and may not due for replacement, as yet .
Edit : Why would you consider/suggest an HDEO for 3 month usage ?
IMO HDEO is good for both of your applications > 12 months .
However with very dark spots within the centre zone in 1987 Volvo , you may want to consider a thicker oil like 15W40 E7/E9 in the case of HDEO or a PCMO xW40 with 'heavy' doses of Boron and/or Molybdenum like say, Mobil 1 0W40 to see if they help with reduced metal wear particles ?
20W50 or 15W50 ? Why not ......... IMHO .
Bro very appreciate that you take your time to check my blotter, and giving the advice that really taking away my worry. phew what a relieve.2200 km over 6 months in a 1987 Volvo B230E 2.3L SOHC MPFI ...
The centre zone is a bit grayish , but it basically remains transparent which is good news .
However within the enlarged/magnified centre zone , one can 'see' clearly spots of very blackish/darkish contrast in relation to the whitish background .
I would speculate this phenomenon arises from the presence of heavy particles/debris in possibly coagulated metal wear particles (like iron/copper/aluminium etc, ) and/or agglomerated organic combustion contaminants etc . But who knows it may not be the case IDK, in particular without evidence/facts from a pricy UOA to support this speculation on my part .
As quite similar to Total Qaurtz Energy 10W40 with 2600 km in another car i.e Honda Accord , there is obvious emergence of slightly grayed/darkened aureole zone/perimeter ring which may require close monitoring on your part .
Diffusion zone is generally clean and transparent , absence of darkened jagged external edge and absence of halo translucent annulus in the outermost zone , which I'm honestly quite surprised with both your low mileage oil samples over 6 month usage . It indicates fuel delivery systems of both engines are in quite a tip-top conditions despite of rather frequent short drives .
My other previous comments on your Honda generally applies in this Volvo , a difference being Honda appears to have lesser metal wear particles vs Volvo , IMHO .
Generally, this 2000 km used Nissan Total 10W40 is still serviceable and may not due for replacement, as yet .
Edit : Why would you consider/suggest an HDEO for 3 month usage ?
IMO HDEO is good for both of your applications > 12 months .
However with very dark spots within the centre zone in 1987 Volvo , you may want to consider a thicker oil like 15W40 E7/E9 in the case of HDEO or a PCMO xW40 with 'heavy' doses of Boron and/or Molybdenum like say, Mobil 1 0W40 to see if they help with reduced metal wear particles ?
20W50 or 15W50 ? Why not ......... IMHO .
Regarding the fuel delivery system which showing in my oil is absence of halo translucent annulus in the outermost zone, could it be the piston ring still in good condition and having good sealing? IDK
Hmm talking about metal wear on the Volvo engine I guess it happend during my 2hours long journey travel. The Engine temperature did spike to abnormal level for few times during my full throttle for more than 1minutes, but it still left 20% before hitting to the critical red zone of the temperature gauge. Temperature go back to normal when I press only half throttle. Culprit to the temperature spike is the coolant reservoir having tiny leak and causing water fall to minimum level mark of the reservoir.
My thought to using the HDEO for 3months then I could drain those debris out ASAP. I'm new to HDEO and I'm worry they have very much detergent than PCEO which may harm my old engine seal, and it is also the reason I'm not willing to try those super fast 15mins engine flush,yet. What do you think about these engine flush?
How do I know the oil has good dose of boron? Is it the thing TBN(total base number) or Sulfated Ash in thiers PDS(product data sheet）or SDS?
Ohya I had forgotten to ask you about the Helix Ultra that is manufactured in AUG 17, and can I still use those old oil? When is the expiry date of engine oil?
Thank you.
Quote
Quite a good bargain wor!
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