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okay naman ang Zic, which variant will you be using? Sa office namin halos lahat ng sasakyan, trucks and forklifts included, Zic X6000 ang gamit namin in the last 5 years, never had an issue with it
Red Line.
I like red line oils, because they have a bit more zddp which is nice for the rockers.
On chilly winter mornings (SF Bay Area) the car did not like reverse or first gears. Subsequently switched to Red Line engine oil. More power, better mileage.
I tried 10W40 in my car as 5W40 was beyond my budget at the time and it's been great.
Before 2023 i was using zic 0w20 but caltex has newer technology
Ran Redline 5w40 when it became purely a summer car in ~2013. ... Not seals are leaking, no issues of any form. Car has been Cobb stage 2 91oct tuned (OTS, not pro-tuned) almost 14 years, with a Crawford v2 AOS, Killer B oil pickup + windage tray being the only reliability mods, and it doesn't burn a single molecule of oil.
Used this for my old Alterra that made it to 250k mileage. Good budget option.
I just put Redline 5w-30 into my 2011 STI at the last oil change. We'll see how it goes.
I’m currently living in Korea and switched to a ZIC SK Enmove X8 5w-30 full synthetic and OEM Kia filter 26300-35505. Pretty much directly after ticking started.
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In March 2026 on PartReview, engine oil RED LINE were overall better than ZIC.
In March 2026 on PartReview, engine oil RED LINE were overall more popular than ZIC.
By vote balance, engine oil RED LINE surpassed ZIC:
By number of reviews, engine oil RED LINE surpassed ZIC:
In March 2026, according to PartReview, engine oil RED LINE led more car-specific ratings than ZIC:
RED LINE are chosen by owners of cars such as: Audi S3, and others.
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Also available: comparisons of engine oil ZIC with: Mobil, Castrol, LIQUI MOLY, MOTUL, Shell, AMSOIL, VALVOLINE, PENNZOIL, OEM Toyota, Mannol.
You can also see who is better among other engine oil manufacturers: Mobil or Castrol, Mobil or LIQUI MOLY, Mobil or MOTUL, Mobil or Shell, LIQUI MOLY or Castrol.