15w40 oil. diesel? RB? what???? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

kouki_s14 · 04-18-2006, 02:27 PM

summer was coming up and i decided to get some thicker oil since socal isnt the coolest place to be. so i ordered a case of 10w40 about a week ago. it just arrived today and i look and saw that they sent me 15w40 instead. i searched around a bit and 15w40 seems to be recommended for diesel engines. anyone think i will have problems just using this oil in my RB? i mean there's only a 5 weight difference, but the whole diesel thing worried me a bit. i think i might be okay, just wanted to get some opinions.

thanks

henry

sunnys14 · 04-18-2006, 02:35 PM

i used 15w-40 in my turbo KA last summer. hotter climates need thicker oil to protect your engine.

zoomswimmer · 02-05-2007, 11:20 PM

the 40 is the weight of the oil the. When there are two numbers (like 15 and 40) that just means it's a multi weight oil and the w means that it can be used in cooler climates. The 15 and 10 are how low of a temp they can go before they get too thick to run in an engine. Here in Utah in the winter, I use 5w30 since is gets below freezing. I can get away with using 10w30 but on cold mornings, the engine has a harder time starting.

04-18-2006, 02:27 PM	#1
kouki_s14 Zilvia FREAK! Join Date: Jan 2004 Location: Los Angeles Posts: 1,550 Trader Rating: (0) Feedback Score: 0 reviews	15w40 oil. diesel? RB? what???? summer was coming up and i decided to get some thicker oil since socal isnt the coolest place to be. so i ordered a case of 10w40 about a week ago. it just arrived today and i look and saw that they sent me 15w40 instead. i searched around a bit and 15w40 seems to be recommended for diesel engines. anyone think i will have problems just using this oil in my RB? i mean there's only a 5 weight difference, but the whole diesel thing worried me a bit. i think i might be okay, just wanted to get some opinions. thanks henry

04-18-2006, 02:35 PM	#2
sunnys14 Zilvia FREAK! Join Date: Mar 2006 Location: a land far far away... Posts: 1,549 Trader Rating: (19) Feedback Score: 19 reviews	i used 15w-40 in my turbo KA last summer. hotter climates need thicker oil to protect your engine.

02-05-2007, 11:20 PM	#3
zoomswimmer Leaky Injector Join Date: Aug 2006 Location: Salt Lake City, Utah Age: 37 Posts: 133 Trader Rating: (2) Feedback Score: 2 reviews	the 40 is the weight of the oil the. When there are two numbers (like 15 and 40) that just means it's a multi weight oil and the w means that it can be used in cooler climates. The 15 and 10 are how low of a temp they can go before they get too thick to run in an engine. Here in Utah in the winter, I use 5w30 since is gets below freezing. I can get away with using 10w30 but on cold mornings, the engine has a harder time starting.