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Previously using 20W-50 dino oil and recently changed to 10W-30. Some people have advised me to retune the engine since I'm now using a lower vis oil. One reason being to lower the idle rpm. Previously, the idle was about 900 rpm now it's 1,000 rpm (probably due to the 10W-30). What do you...

ACE has their own brand of engine oil. Anyone know who makes it for them?

Been told API has a classification for "Energy Conserving II", but I've not seen any oil with that rating. Anyone know of one?

Here in Malaysia, Shell has introduced a Flushing Oil. Comes in a 4 litre pack and the usage is basically: 1. Drain the used oil 2. Fill engine with Shell Flushing Oil 3. Run engine for at least 5 mins 4. Drain the Flushing Oil 5. Replace engine oil & filter What I wanna know is if this method...

Wife drives a 1995 Mitsubishi. The car is driven gently and has only done about 40,000 miles in all these 8 years. All this time, it's been using dino oil 20W-50 (various brands). Bear in mind it's hot & tropical here, it's 86-90°F everyday! So I'm thinking of doing this at the next oil change...

Can anyone tell what kind of base oil this is: CAS# 64741895 CAS# 64742650

Car: Toyota Soarer V8, 4.0 (Lexus SC400) - friend's ride Oil: Caltex Havoline Energy 5W-30 Miles on car: 55,862 Miles on oil: 2,790 Fe: 9 Al: Cu: 1 Cr: Pb: 5 Sn: Mo: 760 Zn: 1044 P : 896 K : 5 Mg: 21 Ca: 2032 Mn: 124 Si: 7 B : 5 Na: 7 Water: Glycol Index: PQ Index: 34 Nitration Index...

These are the specs... SAE: 20W-50 API: SJ Viscosity @ 40°C: 128.6 Viscosity @ 100°C: 12.3 VI: 142 Flash point: 232°C Pour point: -50°C Sulphated Ash: 1.35% TBN: 11.5 Oil is paraffinic base. That's all I have. Oil also meets mil spec MIL-L-46152B (whatever that is) and VW 501.01/505.00 Any...

ARPOL and ABRO. I've been seeing these two brands on the shelves lately. They're both made in USA but info about them is very scarce on the Net. Wondering if any of you guys know. Thanks.