300K miles
12-19-11, 12:04 AM
#46
This statement is half truth, but worded poorly. You can switch between dino and syn oil any time you want during the life of the car and dino oil touches the exact internal parts as syn oil in a motor. In the OP case, it IS a waste of money to switch to syn oil at 300k, especially given the fact that dino oil got him to 300k. Syn oil doesn't break down quickly like dino, thus being able to clean the engine and remove deposits left behind by dino oil and go 8-10k on oil change intervals. That's why a lot of people complain that "syn oil caused my VC gaskets to leak". It didn't cause it to leak, they already had a weak/worn VC gasket, but the crud left behind from dino oil was able to "seal" the problem areas, not causing it to leak. Once changed to syn oil, the high quality Group III or higher oil is able to clean the deposits in the engine, thus removing the deposit/sludge "seal" that stopped the oil from leaking, now all of a sudden you have a leak.
This is exactly what happened with the OP. If the car was already smoking before hand, he would've never made this thread IMO. This happened after the syn oil was used. I say switch back to a dino oil and change out every 5k. Syn oil is a waste of money, especially at your mileage.
This is exactly what happened with the OP. If the car was already smoking before hand, he would've never made this thread IMO. This happened after the syn oil was used. I say switch back to a dino oil and change out every 5k. Syn oil is a waste of money, especially at your mileage.
I would suggest reading an article on ferrari chat. It has changed my views on the types of oil that I run.
http://www.ferrarichat.com/forum/faq...=haas_articles
Last edited by pingu; 12-19-11 at 12:16 AM.
12-19-11, 05:49 AM
#47
Lexus Test Driver
Join Date: Jun 2007
Location: Massachusetts
Posts: 1,599
Likes: 0
Received 0 Likes
on
0 Posts
Lol damn... Would have never guessed your car has 300K miles. Mine looks nowhere near as good and I hit 231K yesterday. I have major road rash on the front bumper.
12-19-11, 07:59 AM
#48
Good article, thanks!
I am puzzled by Amsoil's website, they typically are pushy on the 0W30 oils, but for the 98 GS4, they don't recommend the 0W30, they recommend the 5W30 (stock oil spec). Odd.
After seeing the bearing clearances on the GS4, I would keep closer to the stock weight if at all possible, the bearing clearances aren't wide as barn doors like an old 70's Chevy 350. They are super super tight, tighter than any production engine I have ever seen.
I don't think I would go to a xW40 weight unless you KNOW you are going to push high temps.
I am puzzled by Amsoil's website, they typically are pushy on the 0W30 oils, but for the 98 GS4, they don't recommend the 0W30, they recommend the 5W30 (stock oil spec). Odd.
After seeing the bearing clearances on the GS4, I would keep closer to the stock weight if at all possible, the bearing clearances aren't wide as barn doors like an old 70's Chevy 350. They are super super tight, tighter than any production engine I have ever seen.
I don't think I would go to a xW40 weight unless you KNOW you are going to push high temps.
Listen to this man and learn more about oil before listening to people on the internet. I wouldn't trust anyone who tells you that dino oil is thicker than synthetic...
I would suggest reading an article on ferrari chat. It has changed my views on the types of oil that I run.
http://www.ferrarichat.com/forum/faq...=haas_articles
I would suggest reading an article on ferrari chat. It has changed my views on the types of oil that I run.
http://www.ferrarichat.com/forum/faq...=haas_articles
01-03-12, 02:29 PM
#55
Most of my cars over the last few years have seen 250-275k and I have kept them on a steady diet of Mobil 1 Diesel 5W30 or 5W40 or Shell Rotella T (synthetic and dino) 15W40 or 5W40. I wear the car are far before the drivetrain.... 
Being consistent can't ever hurt, M1 far exceeds the SH (I think) spec on these cars when new. So you aren't going wrong.
Being consistent can't ever hurt, M1 far exceeds the SH (I think) spec on these cars when new. So you aren't going wrong.
01-03-12, 03:01 PM
#57
My American cars are the ones that have seen 250k (94 Fleetwood with 3.42 gears factory), 270k (90 Aerostar E4WD, eats transmissions every 100k) and 275k (91 Bonneville) miles, and the ones I have now are at 176k (00 Park Ave Ultra) and 193k (99 Suburban K2500 454), all with very little drama and cost to keep them running good. Well see how the GS lives compared to them. I am at 146k now. Not one of my cars has had to have the engine opened up at ALL in that many miles, and only that Aerostar had the transmission problems, but that was before and after I had it. Ford's and reliable transmissions.... not a good combo. Engines run forever though.
I have seen too many Toyotas (Matrix and Camry) not make it past 150k on stock engine.... I am hoping the GS4 will show me that it will laugh at that.
I have seen too many Toyotas (Matrix and Camry) not make it past 150k on stock engine.... I am hoping the GS4 will show me that it will laugh at that.
01-03-12, 09:00 PM
#58
Im at 212K on my GS400 and running smooth as butter. Purchased the car at 170K and switched to synthetic and the valve cover gaskets started leaking. Replaced the gaskets and continued to run synthetic (Mobil1 5w30 high mileage)and no more problems. I am sold on the lexus brand....The ones built in Japan, not in Kentucky.
01-04-12, 08:21 AM
#60
when did they start making in KY?
Im at 212K on my GS400 and running smooth as butter. Purchased the car at 170K and switched to synthetic and the valve cover gaskets started leaking. Replaced the gaskets and continued to run synthetic (Mobil1 5w30 high mileage)and no more problems. I am sold on the lexus brand....The ones built in Japan, not in Kentucky.