Engine oil Shell or OEM Mazda

First oil change after filling with T-6 on my 2002 Saab 9-3 (that didn't have a kit on it) I bought with 130k miles on it was really black, almost a bit sludgy. Next few oil changes quickly got better as the detergent broke down sludge in the top end and cleaned the motor up.

I used Rotella T6 for the past few years and no issues

oks yang oil

pero maybe wag mo sagarin sa 6K

go for around 3k-4k dun mo na palitan

I am using shell advance ultra 10w-40 and hindi pa ako nagkaproblem dito sa oil na ito.

Motul H-Tech 100 or Shell Helix Ultra

ito gamit ko sa nmax V1 ko for 4 years, sobrang smooth ng makina, at sa sniper 150 ko naman ng 2 years, wala din ako naging problem sa makina, at sa nmax V2.1 ko ng 4 years wala din ako naging problem. Ito din gamit ko sa ADV 160 ko ngayon sobrang swabe sa makina, tahimik na tahimik. Mahal nga lang talaga 500+ pesos ang price nito pero sulit.

Still using the casa oil which is Shell Helix Ultra 0W-20

Last change oil ko sa Shell, inabot ng 3200php including oil filter then Shell Helix SUV fully synthetic 5W-30 ang oil na ginamit.

Yo usaba Elaion en la Ecosport 2008 y es carisimo para lo que es. Ahora uso el Helix de Shell sin ningun problema

I encountered something similar when I took my CE Turbo in for service a few weeks ago. The invoice said 0W20 and when I asked the service manual why they used the wrong oil they told me “oh our technicians know what oil to use, ignore that.” Needless to say I have zero confidence that the correct oil was used.