[Nando_e90]

I’m changing engine oil of my e90 330i in a few days and I’m thinking of adding a can of Ceratec. For what I’ve read, it isn’t bad for the engine, but some people say that is better to avoid oil additives. My car has 61k miles.

I will also use an injector cleaner. Is it a must to apply it before the oil change? Or it doesn’t have anything to do? Because I filled up the tank yesterday.

Thanks in advance!

[Tambohamilton]

Originally Posted by Nando93

Is it a must to apply it before the oil change?

2 entirely separate systems.

I'd not bother with any additives; just make sure you're using the correct oil, and change every 5000 miles or so. Fresh oil is the best oil, additives or no.

[tomgwuyn]

Originally Posted by Nando93

I’m changing engine oil of my e90 330i in a few days and I’m thinking of adding a can of Ceratec. For what I’ve read, it isn’t bad for the engine, but some people say that is better to avoid oil additives. My car has 61k miles.

I will also use an injector cleaner. Is it a must to apply it before the oil change? Or it doesn’t have anything to do? Because I filled up the tank yesterday.

Thanks in advance!

It is not a must and honestly I didn't see any change in performance or smoothness. I did the same an year back by adding the Liquid Moly CeraTec on my 330i . I didn't find any difference but the check engine light came momentarily and went off. I also used the Chevron Techron System Cleaner a couple of times.

[porsche959]

Didn’t really make a difference in my engine tick. But won’t hurt the engine

[tlow98]

Originally Posted by Tambohamilton

2 entirely separate systems.

I'd not bother with any additives; just make sure you're using the correct oil, and change every 5000 miles or so. Fresh oil is the best oil, additives or no.

If you only drive 5000 miles a year, sure. Otherwise, good synthetic is proven to last 3x+ this. One member on here has been doing this for 400k miles. Oil analysis is your friend.

[Efthreeoh]

Originally Posted by tlow98

If you only drive 5000 miles a year, sure. Otherwise, good synthetic is proven to last 3x+ this. One member on here has been doing this for 400k miles. Oil analysis is your friend.

And he's never had an oil analysis done, or so I've heard...

[Efthreeoh]

OP, just use 5W-30 oil that meets BMW spec LL-01 and the MANN HU-816x oil filter, and your engine will last a very long time.

[Volasko]

I say go for it and don't stress about it. I've used it a few times because I trust the Liqimoly brand and their products. I liked what I researched about it, thought it couldn't hurt and may help later in life when my motor starts to get up there in mileage. So far so good, just had an oil analysis and so far my 280k km N52 still running tops with no extra metals in my oil. I've also followed a 15k km OCI with OEM oil, so say what you want about what's the cause of the good test results.

[Nando_e90]

Thank you all for your responses. I just did the oil change but only 4 liters of old oil came out of the engine. A month ago I added an extra liter because it asked for it, as it usually does after 5k miles of the oil change. Very normal as far as I know.
But after that, didn’t ask for oil anymore and now I noticed that engine was running with only 4 liters. It should have asked for more, I think. I’m starting to worry. What could it be? I hope it is because of the oil pan leak that it has.

[freakystyly]

I also have a slow oil pan leak and my last oil change dropped out about 5L. The fill 1L warning light would come on at regular intervals and I would check on the computer at least once a week. At a regular oil change you would put in 6.5-7L and top it up if it asks for more.

I think I've read other people having similar missing oil stories.

[Tambohamilton]

Originally Posted by Efthreeoh

OP, just use 5W-30 oil that meets BMW spec LL-01 and the MANN HU-816x oil filter, and your engine will last a very long time.

Is there a specific reason for using that filter? Or just that it's OE, cheap and works?

[Nando_e90]

Originally Posted by Tambohamilton

Is there a specific reason for using that filter? Or just that it's OE, cheap and works?

I think that MANN FILTER is the OE manufacturer.

[Efthreeoh]

Originally Posted by Tambohamilton

Is there a specific reason for using that filter? Or just that it's OE, cheap and works?

It's OEM. It's designed for BMW's extended service intervals. My engine just passed 387,000 miles on 14,000-mile OCI. I've never used anything but the MANN filter.

[Tambohamilton]

Cool, good to know.

[320IN54]

If u run the molygen oil LM makes u arent supposed to use ceratec with it cause it already has friction modifiers. So I'd recommend switching to molygen oil and leave the additives.