Some questions

[ITTI]

hi everyone 1-I have 3 oils what are the best Mobile1 0w-40 VI 185 with this datasheet http://www.mobil.com/Saudi_Arabia-English/Lubes/PDS/GLXXENPVLMOMobil_1_New_Life_0W-40.aspx Shell Helix 0w-40 VI 186 http://www.aljomaihshell.com/ar/pdf/HELIX%20Ultra.pdf shell Helix 10w60 VI 174 http://www.epc.shell.com/docs/GPCDOC_GTDS_Shell_Helix_Ultra_Racing_10W-60_%28SN_CF_A3_B4%29_%28en%29_TDS.pdf this link to calculate VI (to calculate VI for shell 0w-40) http://www.widman.biz/English/Calculators/VI.html 2-If we said the most important physical characterestics is Viscosity Index & synthitec oils better than mineral oil I found mineral oil shell helix 10w-30 has VI 161 and semi-synthetic oil castrol magnatec has VI 14. does shell is better Note: we know the degree of synthitec in semi-synthitec oil is 10%-30% so it may be 10% synthitec and the remainingpercentage is mineral so 10% is synthitec and 90% is mineral if we compare between 10 nad 90 there is a huge different so can we say they are similiar to each other but shell is better because the value of VI 161 shell 10w-30 datasheet http://www.epc.shell.com/docs/GPCDOC_Local_TDS_Oman_Shell_Helix_HX5_10W-30_(SL_CF_A2_B2)_(en)_TDS_v2.pdf castrol 10w-40 datasheet http://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/74C44B9DC8D8A1B780257B1600171A91/$File/BPXE-9526XQ.pdf 3-I have crow victoria 2011 imported from USA I read in owner manuaal use 5w-20 but the weather in my area is too hot in summer tempreture is 55c what is better to use:the same viscosity or another one? thank you

 

[05LGTLtd]

With out application, hard to say what's best. Most likely the most cost effective, easy to source. Leaning toward one of the 0w-40's, but don't know your ambient operating temps. Not sure I understand the 10w-30 question

 

[CharBaby]

You're saying that your summer temperatures are the equivalent of 131 degrees F. ? The U.S. oils in 5W20/0W20 can handle the heat as the engines run waaaay hotter than that. But, any 0W40 should be sufficient.

 

[yvon_la]

Mobil delvac1 le 5w30 (overkill in my view)buy Mobil ep 0w20 and you should be fine the temperature range is insane .why 0w20 ?more group 4 in the 0w20

 

[ac_tc]

stay away from the 10w- 60. Engine temperatures doesent change much with different outside temps as long as the Engine doesent boil so ford´s rec aint to bad despite the high temps.

 

[Bandito440]

Where in Asia are you? Does it get cold there, below 0c? The 10w-30 is fine in your Crown Vic. I see no reason to use 0w-40 or heavier unless it costs less.

 

[ITTI]

05LGTLtd: Do You mean where I drive?in: the city in crowded streets, highways travelling between two cities, highlands or deserts? Q2 I will explain it step by step: We know: I-The most important Physical properties (like pour poin or flash point) is VISCOSITY INDEX (VI) II-synthitec oils better than mineral oil III-Semi-synteitic oils are 10%-30% synthetic IV-Depending on the previous point semi-sythetic are 70%-90% mineral V-Depending on the previous two points semi-synthetic oils which are 10%-15% sythetic, they are 85%-90% mineral VI-If we compare 10% to 90% it is nothing VII-I have castrol magnatec semi sythetic 10w40 VI: 145 & shell helix h5 mineral 10w30 VI:161 So what is the better castrole or shell?why?(if we agnore fuel saving) Char Baby: yes ac_tc: why? Bandito440: Middle East. few places or areas